matter in our surroundings
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This document discusses the particulate nature of matter and introduces students to basic chemistry concepts. It begins by asking questions to assess students' prior knowledge about whether various objects like feathers and gold are made of particles. It then explains that all matter is particulate in nature, consisting of extremely small particles that have space between them. The document discusses how particles move in the three states of matter and compares the rate of diffusion between solids, liquids, and gases. It provides examples like rubber bands, sugar, and sponges to illustrate solid materials that can change shape. Finally, it touches on evaporation and the factors that influence the rate of evaporation.
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CBSE Class 9 Science Chapter-1 Matter in our surroundings
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Matter in our surroundings
This document provides information about matter and its different states. It acknowledges the sources used to create the presentation, which includes class notes, textbooks, and internet resources. The presentation is intended for students and not commercial use. It defines matter and describes its particulate nature and characteristics. It discusses the three common states of matter - solid, liquid, and gas - and how matter can change states through processes like melting, evaporation, and boiling depending on temperature. It concludes with some multiple choice questions about these topics and concepts.
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Chapter - 2, Is matter around us pure?, Science, Class 9
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Chapter 2 - is matter around us pure
Matter can be classified as pure substances or mixtures. Pure substances are either elements or compounds, while mixtures can be homogeneous or heterogeneous. Solutions are homogeneous mixtures where one substance dissolves evenly throughout another. There are several processes that can separate mixtures into their component substances, such as evaporation, crystallization, centrifugation, chromatography, and distillation. Physical changes alter the state of matter but do not change its chemical makeup, while chemical changes form new substances through chemical reactions.
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Matter can exist in three main states: solid, liquid, and gas. The state depends on how tightly or loosely the particles of matter are packed together and how much they move. Solids have a fixed shape and volume as particles are tightly packed and vibrate in place. Liquids have no fixed shape but a fixed volume as particles are closely packed but can move past one another. Gases have no fixed shape or volume as particles are very far apart and move freely throughout their container. Water can change between solid, liquid, and gas states when heat is added or removed, causing its particles to move closer together or farther apart.
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Chapter - 2, Is matter around us pure?, Science, Class 9
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.
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Chapter - 2, Is matter around us pure?, Science, Class 9
PURE SUBSTANCES
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HOMOGENEOUS MIXTURE
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SOLUTION
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This document provides an overview of matter and its properties. It discusses the following key points:
1) Matter is anything that occupies space and has mass. It can be classified based on physical state (solid, liquid, gas), chemical composition (pure substances and mixtures), and early Indian philosophies (five basic elements).
2) Matter is made up of very tiny particles that are in continuous motion, have space between them, and attract each other.
3) The three states of matter are solids, liquids, and gases, which differ in their properties like shape, volume, particle movement and attraction. Matter can change states through processes like melting, boiling, sublimation, and evaporation with the
gravitation
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2. When an object falls towards the earth due to gravitational attraction, it is undergoing free fall. The acceleration during free fall is called acceleration due to gravity (g), which is about 9.8 m/s^2 on earth.
3. Archimedes' principle states that when an object is immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid displaced by the object. This determines whether
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Chapter 2 - is matter around us pure
Matter can be classified as pure substances or mixtures. Pure substances are either elements or compounds, while mixtures can be homogeneous or heterogeneous. Solutions are homogeneous mixtures where one substance dissolves evenly throughout another. There are several processes that can separate mixtures into their component substances, such as evaporation, crystallization, centrifugation, chromatography, and distillation. Physical changes alter the state of matter but do not change its chemical makeup, while chemical changes form new substances through chemical reactions.
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Presentation of science
Matter can exist in three main states: solid, liquid, and gas. The state depends on how tightly or loosely the particles of matter are packed together and how much they move. Solids have a fixed shape and volume as particles are tightly packed and vibrate in place. Liquids have no fixed shape but a fixed volume as particles are closely packed but can move past one another. Gases have no fixed shape or volume as particles are very far apart and move freely throughout their container. Water can change between solid, liquid, and gas states when heat is added or removed, causing its particles to move closer together or farther apart.
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Presentation of science (matter)
Matter is anything that has mass and occupies space. It exists in three main states: solid, liquid, and gas. The state depends on how tightly or loosely the particles are packed. Solids have a fixed shape and volume as particles are tightly packed and vibrate in place. Liquids take the shape of their container but maintain a fixed volume as particles can move past one another. Gases have no definite shape or volume as particles are very far apart and move freely. Water can change states by adding or removing heat, going from solid ice to liquid to gas vapor.
Separating mixtures
Magnetic separation uses magnets to separate mixtures where one substance is attracted to magnets and the other is not, such as separating iron filings from sand. Decantation involves pouring off the liquid layer from a mixture like water and sand so that the denser sediment remains behind. Filtration uses a filter to catch solid particles in a mixture while allowing the liquid to pass through, such as filtering coffee grounds from water.
Matter and forces .
Physical changes are changes that affect the form of a substance but not its chemical composition. Physical changes can be used to separate mixtures into their component compounds through processes like decanting, filtration, evaporation, and distillation. However, physical changes cannot usually separate compounds into chemical elements or simpler compounds.
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Matter in Our Surrounding Class 9 Science notes pdf
Class 9 Science introduces students to the fascinating realm of matter, the fundamental substance that makes up everything in the universe. In this article, we embark on a journey to understand matter, its various states, and its omnipresence in our surroundings.
I. Definition of Matter:
Matter is defined as anything that occupies space and has mass. It encompasses a vast range of substances, from the air we breathe to the solid ground beneath our feet.
II. States of Matter:
Matter exists in three primary states: solid, liquid, and gas. Each state exhibits distinct characteristics, and substances can transition between these states under varying conditions.
Solid: Solids have a fixed shape and volume. Examples include ice, wood, and metals.
Liquid: Liquids have a definite volume but take the shape of their container. Water, oil, and milk are common examples.
Gas: Gases have neither a fixed shape nor volume and fill the entire space available to them. Air and oxygen are examples of gases.
III. Changes of State:
Matter can undergo changes in its state through processes such as melting, freezing, evaporation, and condensation. For instance, water transitions from a solid (ice) to a liquid (water) when heated, and further to a gas (water vapor) upon reaching its boiling point.
IV. Importance of Understanding States of Matter
Understanding the states of matter is crucial in various scientific and practical applications. For example, knowledge of state changes is vital in the design of refrigeration systems, weather patterns, and industrial processes.
V. Brownian Motion:
The Brownian motion, discovered by Robert Brown, exemplifies the constant movement of particles in matter. It is visible when tiny particles, such as pollen, exhibit random motion when suspended in a fluid, revealing the dynamic nature of matter at the microscopic level.
VI. Diffusion:
Diffusion, another phenomenon related to matter, refers to the spontaneous movement of particles from regions of higher concentration to regions of lower concentration. An everyday example is the spreading of fragrance in a room.
VII. Sublimation:
Sublimation is the process by which a substance changes directly from a solid to a gas without passing through the liquid state. Dry ice (solid carbon dioxide) undergoing sublimation is a noteworthy example.
VIII. Applications in Daily Life:
Matter's significance extends to daily life, from cooking processes (water boiling) to the functioning of essential devices like refrigerators and air conditioners.
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Matter around us
This document discusses the classification and properties of matter. It defines matter as anything that occupies space and has mass. Matter is classified based on physical properties as solids, liquids, and gases, and based on chemical properties as elements, compounds, and mixtures. The key properties of particles of matter are that they are very small, have space between them, and are constantly moving. Solids have a fixed shape and volume, liquids have a fixed volume but not shape, and gases have neither a fixed shape nor volume. Diffusion demonstrates the movement of particles in liquids and gases. The particles attract one another, with stronger attraction in solids than liquids or gases.
What happens when matter goes through a physical
A physical change alters the appearance of matter but does not change its chemical composition. Some examples of physical changes described in the document are tearing paper, which changes its shape but remains paper, freezing water into ice, which changes state from liquid to solid but remains water, and stretching a rubber band, which changes its size but remains the same rubber band. Chemical changes, like burning paper or a match, cannot be reversed as they form new substances. The document also discusses mixtures, solutions, and some methods for separating mixtures like picking objects out, using magnets, filtration, and evaporation.
Slideshare ppt 1 a
Matter can be classified according to its state and composition. There are three main states of matter - solids, liquids, and gases. Solids have a definite shape and volume, liquids have a definite volume but not shape, and gases fill their container. Matter can also be classified as pure substances or mixtures. Pure substances are either elements or compounds, while mixtures contain two or more components that can vary in proportions. The document then discusses the characteristics of solids, liquids, and gases as well as properties of matter such as density, hardness, and transparency.
Matter
Matter is anything that has mass and takes up space. It exists in three states: solid, liquid, and gas. In solids, particles are tightly packed; in liquids they are less tightly packed; and in gases particles move freely. Matter can change states through heating and cooling - for example, water exists as a solid (ice) when cold, a liquid at room temperature, and a gas (water vapor) when boiled. Changes between these states are called melting, freezing, boiling, evaporation, and condensation.
What happens when matter goes through a physical
When matter undergoes a physical change, it changes shape or size but retains its chemical composition. Physical changes include tearing paper, freezing water into ice, and stretching a rubber band. These processes change the observable properties of the matter but not its identity - the paper, water, and rubber band remain the same substances. Chemical changes, like burning paper or matches, alter the chemical makeup of the matter and produce new substances that cannot be recovered. Mixtures and solutions involve combining different types of matter without chemical change. Mixtures can be separated using methods like picking objects out, magnets, filtration, or evaporation.
SCIENCE CLASS.pdf
This document provides information about a Grade 2 science class taught by Teacher Merry. It outlines the 5 classroom rules and 5 golden reminders. It then introduces the unit on matter, defining matter as anything that takes up space and has mass. The first lesson is on the characteristics of solids, which are defined as having a clear shape, definite volume and mass, color, texture, and odor. Examples of solids are provided. The next lesson will cover the characteristics of liquids.
Matter around us
Matter is anything that has mass and takes up space. All matter is made of tiny particles called atoms or molecules. Matter exists in different states - solids have a fixed shape and volume, liquids have a fixed volume but take the shape of their container, and gases fill their container evenly. Two additional states are plasma and Bose-Einstein condensates. Atoms and molecules are extremely small and can only be seen with powerful microscopes. They are spaced some distance apart and attract each other, which is why matter holds together in different states. Diffusion is the tendency of particles in gases and liquids to spread out and mix.
Matter (states of) 2nd grade (teach)
Matter exists in three main states: solids, liquids, and gases. Solids maintain a fixed shape unless broken, while liquids flow freely and take the shape of their container. Gases have no fixed shape and expand to fill any container, becoming invisible but detectable through their effects like wind.
Biology Made Simple 2
- Matter is everything that has mass and takes up space, including things you can see or touch as well as things you cannot see like air.
- Atoms are the smallest unit of matter and are made up of protons, neutrons and electrons. Most things are made up of combinations of just six main elements: carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur.
- Matter can exist in three main states - solid, liquid and gas - depending on how close or far apart the atoms and molecules are. Changes between these states involve changes in temperature, pressure or physical processes like melting, boiling, freezing and condensation.
Unit 1. dossier
This document provides an introduction to the topic of matter, materials, and forces. It defines matter as anything that takes up space and has mass. There are two types of substances: elements, made of atoms of the same type, and compounds, made of atoms of different types. All matter has general properties like mass, volume, and density, as well as specific properties that distinguish one substance from another. Forces can cause objects to move, change speed or direction, or change shape. The three states of matter - solid, liquid, and gas - are described based on how tightly or loosely packed their particles are and how they move. Pure substances consist of only one type of matter, while mixtures contain two or more substances that can
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matter in our surroundings
- 1. CHEMISTRY CLASS IX CHAPTER 1 Puneeta Malhotra
- 2. Questions to start with .... Previous knowledge Q1.Is feather matter? Why? Q2.Is it possible to subdivide an object in smaller and smaller particles (infinitely small)? Q3. What do you think is the colour of the particles of gold? Q4. Are particles of rock different from particles of air? Explain your answer. Q5.What is water made up of? And ice?
- 3. Occupy mass and have volume Rock, book, water, oil, air, ............. Can you give more examples?
- 4. • is it continuous like a block of wood? • or is it particulate like sand? Debate?
- 5. When we dissolve salt in water, the particles of salt get into the spaces between particles of water.
- 6. The particles of matter are very small – they are small beyond our imagination!!!!
- 8. Particles of matter have space between them, means there is nothing / vacuum between the particles.
- 9. Are the particles static or in motion? • Particles of liquid and gas are moving or static? • Liquids and gases flow....... • Particles of solid are static?
- 14. Diffusion faster when it is hot
- 21. • (a) What about a rubber band, can it change its shape on stretching? Is it a solid? • (b) What about sugar and salt? When kept in different jars these take the shape of the jar. Are they solid? • (c) What about a sponge? It is a solid yet we are able to compress it. Why?
- 22. A rubber band changes shape under force and regains the same shape when the force is removed. If excessive force is applied, it breaks. The shape of each individual sugar or salt crystal remains fixed, whether we take it in our hand, put it in a plate or in a jar. A sponge has minute holes, in which air is trapped, when we press it, the air is expelled out and we are able to compress it.
- 23. • The rate of diffusion of liquids is higher than that of solids. • This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
- 25. What about rate of diffusion of gases as compared to liquids?
- 29. Due to its high compressibility, large volumes of a gas can be compressed into a small cylinder and transported easily.
- 36. The Dandi March, also known as the Salt Satyagraha, began on 12 March 1930 and was an important part of the Indian independence movement. How did Gandhi ji separate salt from sea water? Can you separate salt and water at home?
- 37. During summers we use earthen pots (MATKA) to get cold water to drink. How does the water inside the matka become cool, however if we place water in a steel container is remains hot? What is special about the earthen pot
- 38. On a hot day, we feel better when we sweat as our sweat disappears and we feel cooler. If it is a hot and humid day, we feel uncomfortable and the sweat does not disappear. How does the sweat disappear? Why does it make us feel cool? Why sweat does not disappear on a humid day?
- 40. EVAPORATION IS A SURFACE PHENOMENON The molecules at the surface change to vapour, therefore if we increase the surface area evaporation becomes faster. Water disappears from a plate quickly as compared to a glass.
- 41. Surface Area Nature of Liquid (force of attraction) Wind speed Temperature Humidity