This document discusses natural phenomena like lightning and earthquakes. It explains that lightning is caused by the accumulation of electric charges in clouds, which results in electric discharge between clouds or between clouds and the earth. The document provides safety tips during thunderstorms, such as seeking shelter inside a building. It also describes how lightning conductors protect buildings. Regarding earthquakes, it states they are caused by disturbances deep within the earth's crust and can cause damage. The document explains earthquakes are measured on the Richter scale.
Std 8th Science Chapter 14 Chemical effect of electric current.pptxMVHerwadkarschool
The passage discusses the chemical effects of electric current, including the process of electroplating. When an electric current passes through a conducting solution, chemical reactions can occur such as the formation of gas bubbles on electrodes or deposition of metal on electrodes. Electroplating is described as depositing a layer of one metal onto another material using electricity. It is a common application that deposits a thin coating of a desired metal, like chromium or tin, which provides properties the base metal lacks, such as corrosion resistance. Proper disposal of used electroplating solutions is important to protect the environment.
14 chemical effects of electric currentCHEKIT SHARMA
this is the best chapter in science as it is my favioratie as i love chemistry and even i think that the people who would view this will like so i request to plese like share and comment so ok today only this much is enough so i'll leave bye
The following power point discusses about the Chemical Effects of Electric Current. In this, we study about how electricity is conduced in liquids, electrolysis and the uses and applications of it
1) Sound is produced by vibrating objects like bells, drums, and musical instruments. Different musical instruments produce sound through the vibration of different parts like strings, membranes, and air columns.
2) In humans, sound is produced when air passes through the vocal cords in the voice box or larynx, causing them to vibrate.
3) Sound requires a medium like air, water, or solids to propagate from the source to the listener. It does not travel through a vacuum.
Natural destructive phenomena such as cyclones, lightning, and earthquakes can cause damage to life and property. Lightning is caused by electric discharge between clouds or between clouds and the earth's surface. Earthquakes result from the movement of tectonic plates deep underground. Proper precautions and building designs that can withstand tremors can help minimize damage from these natural hazards.
Friction CLASS 8 NCERT powerpoint presentation KashishSingh43
full chapter explanation of NCERT of class 8 'FRICTION' i hope you understand it clearly and if you have any queries leave a comment i will try to reply it. there are some videos you can go through it which make your concept more clear ;). i have written everything in a very simple language to make you all understand clearly . there are some textbook exercise in the ppt try to solve it so that you can make your chapter more clear. and last and final there is a recap you can take it as your notes and make your concept more clear
This document is a lesson plan on sound for class 8 students. It covers topics like the production of sound through vibration, how different musical instruments produce sound, the parts of the human ear and how we hear sound, reflection and reverberation of sound waves, infrasonic and ultrasonic sounds, noise pollution and its effects. The document contains definitions of key terms, examples to illustrate different concepts, and activities to help students understand sound better. It is meant to teach students about the science of sound in a clear and easy to understand manner.
Std 8th Science Chapter 14 Chemical effect of electric current.pptxMVHerwadkarschool
The passage discusses the chemical effects of electric current, including the process of electroplating. When an electric current passes through a conducting solution, chemical reactions can occur such as the formation of gas bubbles on electrodes or deposition of metal on electrodes. Electroplating is described as depositing a layer of one metal onto another material using electricity. It is a common application that deposits a thin coating of a desired metal, like chromium or tin, which provides properties the base metal lacks, such as corrosion resistance. Proper disposal of used electroplating solutions is important to protect the environment.
14 chemical effects of electric currentCHEKIT SHARMA
this is the best chapter in science as it is my favioratie as i love chemistry and even i think that the people who would view this will like so i request to plese like share and comment so ok today only this much is enough so i'll leave bye
The following power point discusses about the Chemical Effects of Electric Current. In this, we study about how electricity is conduced in liquids, electrolysis and the uses and applications of it
1) Sound is produced by vibrating objects like bells, drums, and musical instruments. Different musical instruments produce sound through the vibration of different parts like strings, membranes, and air columns.
2) In humans, sound is produced when air passes through the vocal cords in the voice box or larynx, causing them to vibrate.
3) Sound requires a medium like air, water, or solids to propagate from the source to the listener. It does not travel through a vacuum.
Natural destructive phenomena such as cyclones, lightning, and earthquakes can cause damage to life and property. Lightning is caused by electric discharge between clouds or between clouds and the earth's surface. Earthquakes result from the movement of tectonic plates deep underground. Proper precautions and building designs that can withstand tremors can help minimize damage from these natural hazards.
Friction CLASS 8 NCERT powerpoint presentation KashishSingh43
full chapter explanation of NCERT of class 8 'FRICTION' i hope you understand it clearly and if you have any queries leave a comment i will try to reply it. there are some videos you can go through it which make your concept more clear ;). i have written everything in a very simple language to make you all understand clearly . there are some textbook exercise in the ppt try to solve it so that you can make your chapter more clear. and last and final there is a recap you can take it as your notes and make your concept more clear
This document is a lesson plan on sound for class 8 students. It covers topics like the production of sound through vibration, how different musical instruments produce sound, the parts of the human ear and how we hear sound, reflection and reverberation of sound waves, infrasonic and ultrasonic sounds, noise pollution and its effects. The document contains definitions of key terms, examples to illustrate different concepts, and activities to help students understand sound better. It is meant to teach students about the science of sound in a clear and easy to understand manner.
Lightning, earthquakes, and cyclones are some natural destructive phenomena. Lightning occurs when there is an electric discharge between clouds or between clouds and the earth, while earthquakes are caused by disturbances deep within the earth's crust. Both lightning and earthquakes can cause significant damage to life and property.
Some objects like plastic or glass can become electrically charged when rubbed against materials like hair or fur. There are two types of charges - positive and negative - and like charges repel while unlike charges attract. Charges acquired through friction do not constitute an electric current; current involves the movement of charges.
Earthquakes are caused by movements within the earth's crust, made up of shifting tectonic plates. They
light class 8 developed by dsv teachers DhatriBhat
The document discusses various topics related to light and vision, including:
1. What makes things visible includes light reacting with surroundings and the human eye detecting wavelengths of visible light.
2. Laws of reflection define that the angle of reflection equals the angle of incidence. Regular reflection occurs from smooth surfaces while irregular reflection occurs from rough surfaces.
3. The Braille system allows visually impaired persons to read and write through raised dot patterns representing letters and numbers that can be read by touch.
Class 7th science chapter 8. Winds, Storms and CyclonesSwayam Khobragade
This ppt file is converted into pdf so if u want to use it you may download it and convert it into ppt so u can use it for expaining the concepts of this chapter...... This ppt contains only the information given in the textbook.. This ppt also have the keywords,exercises and other basic knowledge....
Stars and the solar system/ class8 / science / physics / ncertTaufiqOMG
The document provides information about celestial objects in our solar system. It begins by describing objects visible in the night sky like stars, planets and the moon. It then discusses the moon's phases and that it does not produce its own light. It notes that astronauts found the moon's surface to be dusty and barren with many craters. The document outlines that stars produce their own light and are much farther than planets. It defines constellations and provides examples. It describes the makeup of our solar system including planets, dwarf planets, asteroids, comets, meteors, and artificial satellites.
This document provides an overview of several natural phenomena including lightnings, electrical charges, earthquakes, and seismographs. It begins with an introduction to natural phenomena and then discusses lightnings, how objects become electrically charged through friction, and how opposite charges attract and like charges repel. The document also explains how to test for electric charge using an electroscope and how charge is transferred. It then covers earthquakes, what causes them, how they are measured on the Richter scale, and safety precautions. Finally, it briefly discusses seismographs and their use in detecting seismic waves generated by earthquakes.
Chapter - 9, Living Organisms And Their Surroundings, Science, Class 6Shivam Parmar
The document discusses different types of environments and habitats that organisms live in. It defines key terms like environment, biotic and abiotic components, and organisms. It then describes the characteristics of living organisms like nutrition, growth, respiration, excretion, habitat and adaptation. Specific examples are provided to illustrate how organisms like camels and fish are adapted to survive in their habitats like deserts and aquatic environments. The different terrestrial habitats of deserts, mountains, grasslands, rainforests and polar regions are outlined. Key aquatic habitats of oceans, rivers and lakes are also described.
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 13, Sound, Science, Class 8
WHAT IS SOUND?
INTRODUCTION TO SOUND
SOUND-PRODUCING MUSICAL INSTRUMENTS
SOUND PROPERTIES
HOW DO HUMANS PRODUCE SOUND?
HOW SOUND PROPAGATE IN A MEDIUM?
SOUNDS BY HUMANS
THERE ARE THREE MAJOR PARTS OF THE HUMAN EAR
AMPLITUDE, TIME PERIOD, AND FREQUENCY
THE LOUDNESS OF A SOUND
PITCH OF THE SOUND
AUDIBLE AND INAUDIBLE SOUNDS
NOISE AND MUSIC
NOISE POLLUTION
CAUSES OF NOISE POLLUTION
EFFECTS OF NOISE POLLUTION
PREVENTION OF NOISE POLLUTION
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
The document discusses various topics related to stars and the solar system. It describes the moon's phases and surface features. It explains that stars are spheres of plasma held together by gravity, with the closest star being the sun. The solar system contains planets, asteroids, comets, and meteors that revolve around the sun due to its gravitational pull. Artificial satellites also orbit Earth and are used for applications like weather forecasting, telecommunications, and remote sensing.
Chapter - 1, Crop Production and Management, Science, Class 8 Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 1, Crop Production and Management, Science, Class 8
INTRODUCTION
CROP
KHARIF CROPS
RABI CROPS
BASIC PRACTICES OF CROP PRODUCTION
PREPARATION OF SOIL
SOWING AND QUALITY OF SEEDS
TRADITIONAL TOOLS (SOWING)
SEED DRILL (SOWING)
MANURE AND FERTILIZERS
IRRIGATION
TRADITIONAL METHODS OF IRRIGATION (MOAT, RAHAT, CHAIN PUMP & DHEKLI)
MODERN METHODS OF IRRIGATION (SPRINKLER SYSTEM & DRIP SYSTEM)
WEEDS
PROTECTING FROM WEEDS
HARVESTING (MANUAL & BY MACHINE)
THRESHING (MANUAL & BY MACHINE)
WINNOWING
STORAGE
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur & Teacher)
Cbse Class 8 Science - Chapter 10 Reaching the Age of Adolescence PPTNarayananNampoothiri1
This document provides information about adolescence and puberty in humans. It discusses that adolescence begins around age 11 and lasts until 18-19 years old, marking the transition from childhood to adulthood. Puberty is the stage of life where the body becomes capable of reproduction, typically occurring between ages 11-16 in boys and 10-15 in girls. The document outlines the physical changes that occur during puberty, including increased height and changes in body shape, development of hair and skin, voice changes, and development of sex organs and secondary sexual characteristics. These changes are controlled by hormones like testosterone and estrogen. It also discusses the menstrual cycle in females and how sex is determined in babies.
Chapter 4 metals and non-metals (class-8) CBSENeetuGupta71
Metals and non-metals are two types of elements. Metals are shiny, sonorous, ductile, malleable, and good conductors of heat and electricity, while non-metals are dull, non-sonorous, non-ductile, non-malleable, and poor conductors. Some exceptions are that mercury is the only metal in liquid form, sodium and potassium are soft metals, iodine is the only lustrous non-metal, and graphite conducts electricity unlike most non-metals. Metals react with oxygen to form metal oxides, hydroxides, and carbonates, while non-metals react with bases in a more complex process without hydrogen gas
The document discusses several natural phenomena including electric charge, lightning, earthquakes, and electroscopes. It describes how electric charge was discovered thousands of years ago and can be generated through friction. Lightning occurs due to massive electrostatic discharges within or between clouds. There are different types of lightning like cloud-to-cloud or cloud-to-ground. Earthquakes are caused by the movement of tectonic plates and result in sudden shaking of the land. An electroscope is an instrument that detects electric charge, while a seismograph measures earthquakes. The document provides information on these natural phenomena through text and images.
This document discusses combustion and flames. It defines combustion as a chemical process where a substance reacts with oxygen to produce heat. Three conditions are needed for combustion: a fuel, oxygen, and heat. It describes the structure of a candle flame as having three zones - an outer blue zone of complete combustion, a middle yellow luminous zone of partial combustion, and an inner black zone of unburned fuel vapors. It also discusses different types of fuels and their calorific values, as well as the harmful environmental effects of burning fuels like air pollution and global warming.
Forces can be pushes, pulls, or a combination of both. A force is any interaction between two objects that causes a change in motion or shape. There are two main types of forces - contact forces that act when objects touch, and non-contact forces that act over a distance like magnetic or gravitational forces. Pressure is the amount of force applied over a given area, and depends on both the force and the contact area. Applying force over a smaller area results in greater pressure.
Chapter- 17 Forests - Our Lifeline Class 7th ppt. This Chapter is taken from NCERT Class 7th Science textbook. This ppt is only for Class 7th students.
Force is a push or pull that can cause objects to move, change speed or direction, or deform shape. There are different types of forces including pressure, which is the force applied over an area. Liquids and gases exert pressure depending on factors like height, and atmospheric pressure varies with altitude and temperature. Atmospheric pressure is important and has applications like pressurized aircraft cabins.
The document discusses concepts related to gravitation including Newton's universal law of gravitation, Kepler's laws of planetary motion, acceleration due to gravity, and equations of vertical motion. Some key points covered include:
1) Newton's universal law of gravitation states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
2) Kepler's laws describe the motion of planets and include that planets move in elliptical orbits with the sun at one focus.
3) Acceleration due to gravity on Earth is approximately 9.8 m/s2 and causes objects to experience weight. Weight depends on both mass and location.
This document discusses various types of natural phenomena including geological, meteorological, and oceanographic phenomena. It provides examples of different natural phenomena such as earthquakes, volcanic eruptions, hurricanes, tsunamis, and more. Exposure to natural forces resulted in over 200,000 deaths globally in 2010. The document then focuses on lightning, discussing what causes it and providing examples of electric sparks on a smaller scale similar to lightning. It also discusses how ancient people did not understand lightning and thought it was caused by gods.
This document provides an overview of various natural phenomena including lightning, earthquakes, electric charge, and related topics. It discusses how lightning occurs as a discharge between electrically charged regions. Earthquakes are caused by the movement of tectonic plates deep underground. Electric charge is a physical property that causes objects to experience force in electromagnetic fields, and there are positive and negative types of charge. Instruments like electroscopes and seismographs can be used to detect electric charge transfer and seismic waves from earthquakes. Protection methods are outlined for safety during lightning storms and earthquakes.
Lightning, earthquakes, and cyclones are some natural destructive phenomena. Lightning occurs when there is an electric discharge between clouds or between clouds and the earth, while earthquakes are caused by disturbances deep within the earth's crust. Both lightning and earthquakes can cause significant damage to life and property.
Some objects like plastic or glass can become electrically charged when rubbed against materials like hair or fur. There are two types of charges - positive and negative - and like charges repel while unlike charges attract. Charges acquired through friction do not constitute an electric current; current involves the movement of charges.
Earthquakes are caused by movements within the earth's crust, made up of shifting tectonic plates. They
light class 8 developed by dsv teachers DhatriBhat
The document discusses various topics related to light and vision, including:
1. What makes things visible includes light reacting with surroundings and the human eye detecting wavelengths of visible light.
2. Laws of reflection define that the angle of reflection equals the angle of incidence. Regular reflection occurs from smooth surfaces while irregular reflection occurs from rough surfaces.
3. The Braille system allows visually impaired persons to read and write through raised dot patterns representing letters and numbers that can be read by touch.
Class 7th science chapter 8. Winds, Storms and CyclonesSwayam Khobragade
This ppt file is converted into pdf so if u want to use it you may download it and convert it into ppt so u can use it for expaining the concepts of this chapter...... This ppt contains only the information given in the textbook.. This ppt also have the keywords,exercises and other basic knowledge....
Stars and the solar system/ class8 / science / physics / ncertTaufiqOMG
The document provides information about celestial objects in our solar system. It begins by describing objects visible in the night sky like stars, planets and the moon. It then discusses the moon's phases and that it does not produce its own light. It notes that astronauts found the moon's surface to be dusty and barren with many craters. The document outlines that stars produce their own light and are much farther than planets. It defines constellations and provides examples. It describes the makeup of our solar system including planets, dwarf planets, asteroids, comets, meteors, and artificial satellites.
This document provides an overview of several natural phenomena including lightnings, electrical charges, earthquakes, and seismographs. It begins with an introduction to natural phenomena and then discusses lightnings, how objects become electrically charged through friction, and how opposite charges attract and like charges repel. The document also explains how to test for electric charge using an electroscope and how charge is transferred. It then covers earthquakes, what causes them, how they are measured on the Richter scale, and safety precautions. Finally, it briefly discusses seismographs and their use in detecting seismic waves generated by earthquakes.
Chapter - 9, Living Organisms And Their Surroundings, Science, Class 6Shivam Parmar
The document discusses different types of environments and habitats that organisms live in. It defines key terms like environment, biotic and abiotic components, and organisms. It then describes the characteristics of living organisms like nutrition, growth, respiration, excretion, habitat and adaptation. Specific examples are provided to illustrate how organisms like camels and fish are adapted to survive in their habitats like deserts and aquatic environments. The different terrestrial habitats of deserts, mountains, grasslands, rainforests and polar regions are outlined. Key aquatic habitats of oceans, rivers and lakes are also described.
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 13, Sound, Science, Class 8
WHAT IS SOUND?
INTRODUCTION TO SOUND
SOUND-PRODUCING MUSICAL INSTRUMENTS
SOUND PROPERTIES
HOW DO HUMANS PRODUCE SOUND?
HOW SOUND PROPAGATE IN A MEDIUM?
SOUNDS BY HUMANS
THERE ARE THREE MAJOR PARTS OF THE HUMAN EAR
AMPLITUDE, TIME PERIOD, AND FREQUENCY
THE LOUDNESS OF A SOUND
PITCH OF THE SOUND
AUDIBLE AND INAUDIBLE SOUNDS
NOISE AND MUSIC
NOISE POLLUTION
CAUSES OF NOISE POLLUTION
EFFECTS OF NOISE POLLUTION
PREVENTION OF NOISE POLLUTION
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
The document discusses various topics related to stars and the solar system. It describes the moon's phases and surface features. It explains that stars are spheres of plasma held together by gravity, with the closest star being the sun. The solar system contains planets, asteroids, comets, and meteors that revolve around the sun due to its gravitational pull. Artificial satellites also orbit Earth and are used for applications like weather forecasting, telecommunications, and remote sensing.
Chapter - 1, Crop Production and Management, Science, Class 8 Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 1, Crop Production and Management, Science, Class 8
INTRODUCTION
CROP
KHARIF CROPS
RABI CROPS
BASIC PRACTICES OF CROP PRODUCTION
PREPARATION OF SOIL
SOWING AND QUALITY OF SEEDS
TRADITIONAL TOOLS (SOWING)
SEED DRILL (SOWING)
MANURE AND FERTILIZERS
IRRIGATION
TRADITIONAL METHODS OF IRRIGATION (MOAT, RAHAT, CHAIN PUMP & DHEKLI)
MODERN METHODS OF IRRIGATION (SPRINKLER SYSTEM & DRIP SYSTEM)
WEEDS
PROTECTING FROM WEEDS
HARVESTING (MANUAL & BY MACHINE)
THRESHING (MANUAL & BY MACHINE)
WINNOWING
STORAGE
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur & Teacher)
Cbse Class 8 Science - Chapter 10 Reaching the Age of Adolescence PPTNarayananNampoothiri1
This document provides information about adolescence and puberty in humans. It discusses that adolescence begins around age 11 and lasts until 18-19 years old, marking the transition from childhood to adulthood. Puberty is the stage of life where the body becomes capable of reproduction, typically occurring between ages 11-16 in boys and 10-15 in girls. The document outlines the physical changes that occur during puberty, including increased height and changes in body shape, development of hair and skin, voice changes, and development of sex organs and secondary sexual characteristics. These changes are controlled by hormones like testosterone and estrogen. It also discusses the menstrual cycle in females and how sex is determined in babies.
Chapter 4 metals and non-metals (class-8) CBSENeetuGupta71
Metals and non-metals are two types of elements. Metals are shiny, sonorous, ductile, malleable, and good conductors of heat and electricity, while non-metals are dull, non-sonorous, non-ductile, non-malleable, and poor conductors. Some exceptions are that mercury is the only metal in liquid form, sodium and potassium are soft metals, iodine is the only lustrous non-metal, and graphite conducts electricity unlike most non-metals. Metals react with oxygen to form metal oxides, hydroxides, and carbonates, while non-metals react with bases in a more complex process without hydrogen gas
The document discusses several natural phenomena including electric charge, lightning, earthquakes, and electroscopes. It describes how electric charge was discovered thousands of years ago and can be generated through friction. Lightning occurs due to massive electrostatic discharges within or between clouds. There are different types of lightning like cloud-to-cloud or cloud-to-ground. Earthquakes are caused by the movement of tectonic plates and result in sudden shaking of the land. An electroscope is an instrument that detects electric charge, while a seismograph measures earthquakes. The document provides information on these natural phenomena through text and images.
This document discusses combustion and flames. It defines combustion as a chemical process where a substance reacts with oxygen to produce heat. Three conditions are needed for combustion: a fuel, oxygen, and heat. It describes the structure of a candle flame as having three zones - an outer blue zone of complete combustion, a middle yellow luminous zone of partial combustion, and an inner black zone of unburned fuel vapors. It also discusses different types of fuels and their calorific values, as well as the harmful environmental effects of burning fuels like air pollution and global warming.
Forces can be pushes, pulls, or a combination of both. A force is any interaction between two objects that causes a change in motion or shape. There are two main types of forces - contact forces that act when objects touch, and non-contact forces that act over a distance like magnetic or gravitational forces. Pressure is the amount of force applied over a given area, and depends on both the force and the contact area. Applying force over a smaller area results in greater pressure.
Chapter- 17 Forests - Our Lifeline Class 7th ppt. This Chapter is taken from NCERT Class 7th Science textbook. This ppt is only for Class 7th students.
Force is a push or pull that can cause objects to move, change speed or direction, or deform shape. There are different types of forces including pressure, which is the force applied over an area. Liquids and gases exert pressure depending on factors like height, and atmospheric pressure varies with altitude and temperature. Atmospheric pressure is important and has applications like pressurized aircraft cabins.
The document discusses concepts related to gravitation including Newton's universal law of gravitation, Kepler's laws of planetary motion, acceleration due to gravity, and equations of vertical motion. Some key points covered include:
1) Newton's universal law of gravitation states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
2) Kepler's laws describe the motion of planets and include that planets move in elliptical orbits with the sun at one focus.
3) Acceleration due to gravity on Earth is approximately 9.8 m/s2 and causes objects to experience weight. Weight depends on both mass and location.
This document discusses various types of natural phenomena including geological, meteorological, and oceanographic phenomena. It provides examples of different natural phenomena such as earthquakes, volcanic eruptions, hurricanes, tsunamis, and more. Exposure to natural forces resulted in over 200,000 deaths globally in 2010. The document then focuses on lightning, discussing what causes it and providing examples of electric sparks on a smaller scale similar to lightning. It also discusses how ancient people did not understand lightning and thought it was caused by gods.
This document provides an overview of various natural phenomena including lightning, earthquakes, electric charge, and related topics. It discusses how lightning occurs as a discharge between electrically charged regions. Earthquakes are caused by the movement of tectonic plates deep underground. Electric charge is a physical property that causes objects to experience force in electromagnetic fields, and there are positive and negative types of charge. Instruments like electroscopes and seismographs can be used to detect electric charge transfer and seismic waves from earthquakes. Protection methods are outlined for safety during lightning storms and earthquakes.
Lightning is caused by the accumulation of electrical charges in clouds. Positive charges collect near the upper edges of clouds and negative charges near the lower edges. When the positive and negative charges meet between clouds or between clouds and the ground, it produces streaks of bright light called lightning. Lightning conductors are used to protect buildings by providing a safe path for electricity to travel from the lightning strike into the ground without harming the structure. Earthquakes are caused by movements of the Earth's tectonic plates and can cause damage. Areas with fault lines between plates are more prone to earthquakes. The Richter scale is used to measure the magnitude and destructive power of earthquakes. Protective measures during an earthquake include hiding under stur
This document discusses several natural phenomena including earthquakes, lightning, and charges. It explains that earthquakes are caused by disturbances deep within the earth's crust. Lightning occurs due to the separation of positive and negative charges between clouds and the ground. There are two types of charges: positive and negative. Like charges repel each other, while unlike charges attract. It also describes how to protect buildings and people from earthquakes and lightning using lightning conductors and taking shelter. An electroscope is used to detect static electric charges on objects.
This document discusses electrical energy and static electricity. It begins by providing examples of static electricity from everyday life like sparks from clothing. It then explains that electrical energy comes from batteries that convert chemical energy and from power stations to homes. Electrical energy powers many devices and modern life relies on it. The document goes on to define objectives about static electricity, electric charges, potential difference, current, Ohm's law, and electrical concepts. It provides activities and explanations about positive and negative charges and Coulomb's law governing the force between charged particles.
This document discusses natural phenomena like lightning, earthquakes, and charging by friction. It then covers the following topics:
- The two types of electric charges (positive and negative) and how like charges repel and unlike charges attract.
- How to make a simple electroscope and use it to test electric charge.
- How charge can be transferred through contact or discharge.
- What lightning is and how lightning conductors protect buildings.
- Causes of earthquakes and some safety precautions during earthquakes.
Static electricity results when electrons are transferred between objects, leaving one object with a net positive charge and the other with a net negative charge. Materials are made of atoms containing protons, neutrons, and electrons. Insulators have few free electrons, while conductors have many, allowing charge to flow more easily. Unlike charges attract due to their opposite polarity, while like charges repel. Electrostatics has applications including photocopiers, spray painting, and electrostatic precipitators that remove particles from emissions.
1) The document discusses various natural phenomena including lightning, earthquakes, and cyclones. It describes how lightning is caused by electric discharge between clouds or between clouds and the earth, while earthquakes result from disturbances deep within the earth's crust.
2) It also covers topics of static electricity, including how friction can be used to charge objects and the interaction between charged objects. Like charges repel each other, while unlike charges attract.
3) The document provides guidance on safety during lightning storms and earthquakes, such as taking shelter if outdoors and avoiding contact with wiring if indoors during storms, or sheltering under sturdy furniture during quakes.
The document contains information about electricity, including how objects become charged through friction or gaining/losing electrons, the forces of attraction and repulsion between charged objects, and different charging processes like conduction and induction. It also provides examples of how static electricity works, such as a balloon becoming negatively charged after being rubbed with hair. The document seeks to explain basic concepts about electricity in an accessible way.
Electric Charge and Static Electricity PPT.pptxMarkJayAquillo
This document discusses electric charge and static electricity. It explains that atoms contain positively charged protons, neutral neutrons, and negatively charged electrons. The law of electric charges states that like charges repel and opposite charges attract. Objects can become charged through friction, conduction, or induction by gaining or losing electrons. Conductors allow charge to flow easily while insulators do not. Static electricity occurs when a stationary electric charge builds up on an object. Lightning forms when built-up electric charges in clouds discharge to the ground.
Electric Charge and Static Electricity PPT (1).pptxMarkJayAquillo
This document discusses electric charge and static electricity. It explains that atoms contain positively charged protons, neutral neutrons, and negatively charged electrons. The law of electric charges states that like charges repel and opposite charges attract. Objects can become charged through friction, conduction, or induction by gaining or losing electrons. Conductors allow charge to flow easily while insulators do not. Static electricity occurs when a stationary electric charge builds up on an object. Lightning forms when built-up charges in clouds discharge to the ground.
Static electricity is the buildup of electric charges on the surface of objects. It occurs through three main processes: friction, conduction, and induction. When certain materials are rubbed together, electrons are transferred, leaving one material with an excess of electrons and the other with a deficit. This separation of charges causes a static electric force. No new charges are created in this process - electrons simply move between objects. Conductors allow charge to flow easily while insulators do not, making insulators prone to charging. Grounding neutralizes charge by providing a path to earth. Lightning is a large-scale example of static discharge.
The document discusses electric charges and lightning. It defines electric charges and how they are created through friction between objects. Positively charged objects attract negatively charged objects and like charges repel. Lightning is formed when positive and negative charges build up within storm clouds and discharge through sparks. There are two types of lightning - sheet lightning occurs within a cloud, while fork lightning discharges between clouds or from clouds to the ground/buildings. The document also provides safety tips to prevent lightning injuries.
The document discusses the history and properties of electricity and magnetism. It covers how electricity was first observed in amber, the development of theories on positive and negative charges by scientists like Du Fay and Franklin, and how static electricity works. It also explains concepts like conductors, insulators, charging and grounding objects, and Coulomb's law governing the electric force between charges.
This document discusses the fundamental concepts of electromagnetism. It explains that electromagnetism underlies most of the forces we experience in everyday life, with the exception of gravity. Examples given include pushing an object, standing on the Earth's surface, and static/kinetic friction. The document then provides a brief history of the discovery of electromagnetism dating back to Thales' observation of static electricity in amber. It defines key terms like electrification and static electricity. Finally, it outlines some basic properties of electric charges like the constant total charge in the universe and quantization of charge in integer multiples of the elementary charge.
This document discusses static electricity and how objects become electrically charged. It describes three main ways that objects can become charged: 1) charging by friction, where electrons are transferred between two objects in contact with each other; 2) charging by conduction, where charge flows through a conducting material when it touches a charged object; and 3) charging by induction, where a charged object induces a charge in a nearby object without direct contact. The document also discusses properties of charges, insulators and conductors, electroscopes for detecting charge, lightning formation in clouds, and how a Van de Graaff generator works to produce high voltages.
Natural phenomena are fascinating occurrences that happen in the world around us. These events are driven by the laws of nature and can be observed in various forms. Studying natural phenomena helps us understand the underlying scientific principles and their impact on our environment and daily lives. In this set of study notes, we will delve into several captivating some natural phenomena class 8 students.
For more information, visit-www.vavaclasses.com
This lecture overview covers key concepts in electrostatics including electrical forces and charges, Coulomb's law, conductors and insulators, charging methods, electric fields, electric potential, and energy storage in capacitors. Specifically, it discusses how opposite charges attract and like charges repel, defines conductors as materials with free electrons and insulators as tightly bound electrons, explains how Coulomb's law quantifies the relationship between electric force and charge separation, and describes how capacitors store energy by separating opposite charges on conducting plates.
Charging by friction occurs when two materials are rubbed together, causing electrons to be transferred from one material to the other based on their positions in the electrostatic series. Charging by conduction involves direct contact between two objects, causing charge to be shared between them. Charging by induction does not require contact—bringing a charged object near an object connected to ground by a wire causes its charge to increase by attracting or repelling the object's electrons through the wire. An electroscope is used to detect charge by causing its metal leaves to spread apart in the presence of a charged object due to induction and the redistribution of its internal electrons.
Similar to Std 8th Science Chapter 15 Some natural phenomena.pptx (20)
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
हिंदी वर्णमाला पीपीटी, hindi alphabet PPT presentation, hindi varnamala PPT, Hindi Varnamala pdf, हिंदी स्वर, हिंदी व्यंजन, sikhiye hindi varnmala, dr. mulla adam ali, hindi language and literature, hindi alphabet with drawing, hindi alphabet pdf, hindi varnamala for childrens, hindi language, hindi varnamala practice for kids, https://www.drmullaadamali.com
How to Fix the Import Error in the Odoo 17Celine George
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
2. Introduction
• Cyclones can cause a lot of damage to human life
and property.
• We can protect ourselves from these destructive
phenomena to some extent.
• In this chapter we shall discuss two other destructive
natural phenomena. These are lightning and
earthquakes.
3. Lightning
• You might have seen sparks on a electric pole when wires become loose.
This phenomenon is quite common when wind is blowing and shaking the
wires. You might also have seen sparks when a plug is loose in its socket.
Lightning is also an electric spark, but on a huge scale.
• In ancient times, people did not understand the cause of these sparks.
They were, therefore, afraid of lightning and thought that the wrath of
gods was visiting them. Now, of course, we understand that lightning is
caused by the accumulation of charges in the clouds. We need not be
afraid of lightning, but we have to take precautions to protect ourselves
from the deadly sparks.
• Lightning: The process of electric discharge between clouds and the earth
or between different clouds causes lightning
4.
5. Charging by Rubbing
• Take a used ballpen refill and rub it vigorously with a piece
of polythene. Bring it close to small pieces of paper. Take
care not to touch the rubbed end of the refill with your hand
or with a metallic object.
• When a plastic refill is rubbed with polythene, it acquires a
small electric charge. Similarly, when a plastic comb is
rubbed with dry hair, it acquires a small charge. These
objects are called charged objects. In the process of
charging the refill and the plastic comb, polythene and hair
also get charged.
6. Types of Charges and Their
Interaction
• There are two kinds
of charges positive
charge negative
charge.
• Like charges repel
• Unlike charges
attract each other.
7. • (a) Inflate two balloons. Hang them in such a way that they do
not touch each other. Rub both the balloons with a woollen
cloth and release them. What do you observe?
• Now let us repeat this activity with the used pen refills. Rub
one refill with polythene. Place it carefully in a glass tumbler
using the tumbler as a stand.
• Rub the other refill also with polythene. Bring it close to the
charged refill. Be careful not to touch the charged end with
your hand. Is there any effect on the refill in the tumbler? Do
the two attract each other, or repel each other? In this activity
we have brought close together the charged objects that were
made of the same material. What happens if two charged
objects made of different materials are brought close to each
other? Let’s find out.
• (b) Rub a refill and place it gently in a glass tumbler as before.
Bring an inflated charged balloon near the refill and observe.
8.
9. Electric current produces magnetic
field :
• A charged balloon repelled a charged balloon.
• A charged refill repelled a charged refill.
• But a charged balloon attracted a charged refill.
• It is a convention to call the charge acquired by a glass rod when it is
rubbed with silk as positive. The other kind of charge is said to be negative.
• It is observed that when a charged glass rod is brought near a charged
plastic straw rubbed with polythene there is attraction between the two.
• The electrical charges generated by rubbing are static. They do not move
by themselves. When charges move, they constitute an electric current.
10. Transfer of Charge
• Take an empty jam bottle. Take a piece of cardboard slightly
bigger in size than the mouth of the bottle. Pierce a hole in it so
that a metal paper clip can be inserted. Open out the paper clip
as shown in Fig. Cut two strips of aluminium foil about 4 cm × 1
cm each. Hang them on the paper clip as shown. Insert the paper
clip in the cardboard lid so that it is perpendicular to it. Charge a
refill and touch it with the end of the paper clip. Observe what
happens. Is there any effect on the foil strips? Do they repel each
other or attract each other? Now, touch other charged bodies
with the end of the paper clip. Do foil strips behave in the same
way in all cases? Can this apparatus be used to detect whether a
body is charged or not? Can you explain why the foil strips repel
each other?
11. • The aluminium foil strips receive the same charge from the
charged refill through the paper clip (remember that metals are
good conductors of electricity). The strips carrying similar
charges repel each other and they become wide open. Such a
device can be used to test whether an object is carrying charge
or not. This device is known as electroscope.
• Thus, we find that electrical charge can be transferred from a
charged object to another through a metal conductor. Touch
the end of the paper clip gently with hand and you will find a
change in the foil strips. They come back to their original state.
Repeat charging of foil strips and touching the paper clip.
Every time you will find that the foil strips collapse as soon as
you touch the paperclip with hand.
• The reason is that the foil strips lose charge to the earth
through your body. We say that the foil strips are discharged.
12. ELECTROSCOPE
• A device which can be used to test whether
an object is carrying charge or not is called
an electroscope.
• An electroscope can be made using an
empty bottle, cardboard, paper clip and two
strips of aluminium foils.
• Pass one end of a paper clip through the
cardboard and hang the two aluminium slip
at the other end of the
• Working: If a charged body is touched to
the end of paper clip, the aluminium strip
repel each other.
13. • The process of transferring of charge from a
charged object to the earth is called earthing.
• Earthing is provided in buildings to protect us from
electrical shocks due to any leakage of electrical
current.
Earthing
14. The Story of Lightning
• During the development of a thunderstorm, the air currents
move upward while the water droplets move downward. These
vigorous movements cause separation of charges. By a process,
not yet completely understood, the positive charges collect near
the upper edges of the clouds and the negative charges
accumulate near the lower edges. There is accumulation of
positive charges near the ground also. When the magnitude of
the accumulated charges becomes very large, the air which is
normally a poor conductor of electricity, is no longer able to
resist their flow. Negative and positive charges meet, producing
streaks of bright light and sound. We see streaks as lightning.
The process is called an electric discharge.
15. • The process of electric discharge can
occur between two or more clouds, or
between clouds and the earth. Today
we need not get frightened by
lightning like our ancestors did. Now
we understand the basic
phenomenon. Scientists are trying
hard to improve this understanding.
However, lightning strike could
destroy life and property. It is,
therefore, necessary to take measures
to protect ourselves.
16. Lightning Safety
• During lightning and thunderstorm no open place is safe.
• Hearing thunder is an alert to rush to a safer place.
• After hearing the last thunder, wait for some time before
coming out of the safe place.
Finding a Safe Place
• A house or a building is a safe place.
• If you are travelling by car or by bus, you are safe inside
with windows and doors of the vehicle shut.
17. • Outside
• Open vehicles, like motorbikes, tractors,
construction machinery, open cars are not
safe. Open fields, tall trees, shelters in parks,
elevated places do not protect us from
lightning strokes.
• Carrying an umbrella is not at all a good idea
during thunderstorms.
• If in a forest, take shelter under shorter trees.
• If no shelter is available and you are in an
open field, stay far away from all trees. Stay
away from poles or other metal objects. Do not
lie on the ground. Instead, squat low on the
ground. Place your hands on your knees with
your head between the hands. This position
will make you the smallest target to be struck.
Do’s and Don’ts during a
Thunderstorm
18. • Inside the house
• Lightning can strike telephone cords, electrical wires and metal
pipes (Do you remember, lightning is an electrical discharge?).
During a thunderstorm contact with these should be avoided. It is
safer to use mobile phones and cordless phones. However, it is not
wise to call up a person who is receiving your phone through a wired
phone.
• Bathing should be avoided during thunderstorms to avoid contact
with running water.
• Electrical appliances like computers, TVs, etc., should be unplugged.
Electrical lights can remain on. They do not cause any harm.
19. • Lightning Conductor is a device used to
protect buildings from the effect of lightning.
A metallic rod, taller than the building, is
installed in the walls of the building during
its construction. One end of the rod is kept
out in the air and the other is buried deep in
the ground (Fig. 15.7). The rod provides easy
route for the transfer of electric charge to the
ground.
• The metal columns used during construction,
electrical wires and water pipes in the
buildings also protect us to an extent. But do
not touch them during a thunderstorm.
Lightning Conductors
20. Earthquakes
• An earthquake is a sudden shaking or
trembling of the earth. It is caused by a
disturbance deep inside the earth’s crust.
• An earthquake can cause damage to
buildings, bridges, dams and people. There
can be a great loss to life and property.
• The earthquakes can cause floods,
landslides and tsunamis.
• An earthquake is measured on the Richter
scale.
• Really destructive earthquakes have
magnitudes higher than 7 on the Richter
scale. Both Bhuj and Kashmir earthquakes
had magnitudes greater than 7.5.
21. • The tremors are caused by the disturbance deep down inside the uppermost
layer of the earth called the crust.
• The outermost layer of the earth is not in one piece. It is fragmented. Each
fragment is called a plate. These plates are in continual motion. When they
brush past one another, or a plate goes under another due to collision, they
cause disturbance in the earth’s crust. It is this disturbance that shows up as an
earthquake on the surface of the earth.
• Tremors on the earth can also be caused when a volcano erupts, or a meteor hits
the earth, or an underground nuclear explosion is carried out. However, most
earthquakes are caused by the movement of earth’s plates.
• Since earthquakes are caused by the movement of plates, the boundaries of the
plates are the weak zones where earthquakes are more likely to occur. The weak
zones are also known as seismic or fault zones.
• In India, the areas most threatened are Kashmir, Western and Central
Himalayas, the whole of North-East, Rann of Kutch, Rajasthan and the Indo–
Gangetic Plane. Some areas of South India also fall in the danger zone.
Structure of the earth
22.
23. • Consult qualified architects and structural engineers.
• In highly seismic areas, the use of mud or timber is better than using
heavy construction material. Keep roofs as light as possible. In case the
structure falls, the damage will not be heavy.
• It is better if the cupboards and shelves are fixed to the walls, so that
they do not fall easily.
• Be careful where you hang wall clocks, photo-frames, water heaters
etc., so that in the event of an earthquake, they do not fall on people.
• Since some buildings may catch fire due to an earthquake, it is
necessary that all buildings, especially tall buildings, have fire fighting
equipment in working order.
• The Central Building Research Institute, Roorkee, has developed
knowhow to make quake-resistant houses.
Protection From Earthquakes
24. Protection Against Earthquakes
1. If you are at home
• Take shelter under a table and stay there till the shaking stops.
• Stay away from tall and heavy objects that may fall on you.
• If you are in bed, do not get up. Protect your head with a pillow.
2. If you are outdoors
• Find a clear spot, away from buildings, trees and overhead power
lines. Drop to the ground.
• If you are in a car or a bus, do not come out. Ask the driver to
drive slowly to a clear spot. Do not come out till the tremors stop.
25. • The tremors produce waves on the surface of the earth. These are called
seismic waves. The waves are recorded by an instrument called the
seismograph. The instrument is simply a vibrating rod, or a pendulum,
which starts vibrating when tremors occur. A pen is attached to the vibrating
system. The pen records the seismic waves on a paper which moves under it.
By studying these waves, scientists can construct a complete map of the
earthquake, as shown in. They can also estimate its power to cause
destruction.
• Like many other scales in science (decibel is another example), Richter scale
is not linear. This means that an earthquake of magnitude 6 does not have
one and half times the destructive energy of an earthquake of magnitude 4.
In fact, an increase of 2 in magnitude means 1000 times more destructive
energy. Therefore, an earthquake of magnitude 6 has thousand times more
destructive energy than an earthquake of magnitude 4.
SEISMOGRAPH