physical and chemical changes | Physical change
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This is 7th standard chapter 6 cbse science part. It contains physical change part only. Check out other slides for more topics.
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physical and chemical changes | Introduction
This is 7th standard chapter 6 cbse science part.
It contains physical change part only.
Check out other slides for more topics.
Physical Or Chemical Change Picture Quiz
A picture quiz to get students to identify chemical changes and physical changes. Could be used as an introduction to a lesson or as an assessment of their learning afterwards.
Physical changes NCERT Grade 7 chapter 6
This science document discusses physical and chemical changes. It defines reversible changes as changes that can be undone to return a substance to its original state, and irreversible changes as changes that cannot be reversed. The document then gives examples of how the physical properties of substances like shape, size, color, and state can be changed through physical changes like folding, cutting, heating and cooling. It states that physical changes involve alterations in physical properties but do not create new substances, and most physical changes are reversible but some like cutting are irreversible.
Changes around us
The document lists and describes examples of physical and chemical changes. Physical changes include changes in state through melting, boiling, evaporation, or freezing, which do not alter the chemical makeup of the substance. Chemical changes result in the formation of new chemical substances through chemical reactions, such as burning, rusting, cooking, and digestion.
2 physical and chemical change
Physical changes alter the form of a substance but do not create new substances, while chemical changes result in one or more new substances forming. Signs of a chemical change include a change in color, scent, the release or absorption of heat, or fizzing. Examples provided demonstrate whether various processes like burning wood, rusting iron, melting butter, and dissolving salt are physical or chemical changes, and whether they are reversible.
4th grade unit c ch. 11 lesson 4 how does matter change
Physical changes alter the shape, size, or state of matter without producing new substances, such as breaking a pencil, freezing water, or melting ice. Chemical changes produce entirely new substances through molecular rearrangement, evidenced by traits like bubbles, color changes, smells, or temperature changes. An example of a chemical change is mixing glue with Borax solution to form a new substance called "goop."
chemical changes NCERT CLASS 7 CHAPTER 6
This document discusses physical and chemical changes, using the burning of magnesium ribbon as an example of a chemical change. It notes that a chemical change results in a new substance being formed, is irreversible, and can produce heat, light, gases or smells. When magnesium ribbon burns in oxygen, it forms magnesium oxide, a white ash, demonstrating that a new substance is created in a chemical reaction.
PHYSICAL AND CHEMICAL CHANGE
This document discusses the differences between physical and chemical changes. Physical changes can be easily undone and do not change the substance's composition, though the substance's state or the arrangement of its molecules may change. Chemical changes result in a new substance through molecular rearrangement and cannot be easily reversed. Examples of physical changes include breaking or cutting an object, while examples of chemical changes include burning wood or digesting food.
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physical and chemical changes | Introduction
This is 7th standard chapter 6 cbse science part.
It contains physical change part only.
Check out other slides for more topics.
Physical Or Chemical Change Picture Quiz
A picture quiz to get students to identify chemical changes and physical changes. Could be used as an introduction to a lesson or as an assessment of their learning afterwards.
Physical changes NCERT Grade 7 chapter 6
This science document discusses physical and chemical changes. It defines reversible changes as changes that can be undone to return a substance to its original state, and irreversible changes as changes that cannot be reversed. The document then gives examples of how the physical properties of substances like shape, size, color, and state can be changed through physical changes like folding, cutting, heating and cooling. It states that physical changes involve alterations in physical properties but do not create new substances, and most physical changes are reversible but some like cutting are irreversible.
Changes around us
The document lists and describes examples of physical and chemical changes. Physical changes include changes in state through melting, boiling, evaporation, or freezing, which do not alter the chemical makeup of the substance. Chemical changes result in the formation of new chemical substances through chemical reactions, such as burning, rusting, cooking, and digestion.
2 physical and chemical change
Physical changes alter the form of a substance but do not create new substances, while chemical changes result in one or more new substances forming. Signs of a chemical change include a change in color, scent, the release or absorption of heat, or fizzing. Examples provided demonstrate whether various processes like burning wood, rusting iron, melting butter, and dissolving salt are physical or chemical changes, and whether they are reversible.
4th grade unit c ch. 11 lesson 4 how does matter change
Physical changes alter the shape, size, or state of matter without producing new substances, such as breaking a pencil, freezing water, or melting ice. Chemical changes produce entirely new substances through molecular rearrangement, evidenced by traits like bubbles, color changes, smells, or temperature changes. An example of a chemical change is mixing glue with Borax solution to form a new substance called "goop."
chemical changes NCERT CLASS 7 CHAPTER 6
This document discusses physical and chemical changes, using the burning of magnesium ribbon as an example of a chemical change. It notes that a chemical change results in a new substance being formed, is irreversible, and can produce heat, light, gases or smells. When magnesium ribbon burns in oxygen, it forms magnesium oxide, a white ash, demonstrating that a new substance is created in a chemical reaction.
PHYSICAL AND CHEMICAL CHANGE
This document discusses the differences between physical and chemical changes. Physical changes can be easily undone and do not change the substance's composition, though the substance's state or the arrangement of its molecules may change. Chemical changes result in a new substance through molecular rearrangement and cannot be easily reversed. Examples of physical changes include breaking or cutting an object, while examples of chemical changes include burning wood or digesting food.
chemical and phsical changes
1) The document discusses physical and chemical changes, providing examples of each from everyday life.
2) A physical change alters a substance's physical properties like shape, size, or state but does not create new substances. It is generally reversible.
3) A chemical change produces new substances through chemical reactions. It is accompanied by changes in heat, light, smell, color or gas production and is not reversible. Common examples are burning, rusting, and food spoilage.
Physical change or chemical change
A physical change can be reversed and only alters the shape or form of the material, while a chemical change produces new substances that cannot be reversed back to the original forms. Toasting bread and burning wood are examples of chemical changes, as the original substances cannot be recovered, while shaping clay into pots is a physical change since it remains clay just in a different shape. Determining if a change is physical or chemical is not always clear cut and may require microscopic examination in some cases.
Physical & chemical change
This document discusses the difference between physical and chemical changes in matter. A physical change alters the form or properties of a substance without changing its chemical composition, such as cutting, crushing, dissolving, or changes in state. A chemical change results in one or more new substances being formed through chemical reactions, evidenced by signs like color change, bubbling, gas production or temperature change. Examples of physical changes given are melting ice, sawing wood, and evaporating a puddle. Chemical change examples include burning fuels, baking a cake, and dissolving sugar in tea.
Physical and chemical changes of matter
This document discusses physical and chemical changes of matter. It provides examples of physical changes such as melting, dissolving, and grinding, which change a substance's appearance or state but not its chemical composition. Chemical changes, like burning paper or sugar, produce new substances with different properties from the original. The key difference is that physical changes alter appearance or state while chemical changes alter the actual molecular structure and identity of a substance.
Changes that Matter Undergoes
This document summarizes the differences between physical and chemical changes in matter. It defines matter as anything that occupies space and has mass. A physical change alters the form of matter but does not create a new substance, and may be reversible. A chemical change produces a new substance that cannot be changed back to the original by ordinary means. Examples of each type of change are provided for classification exercises.
Physical or chemical changes
This document discusses the differences between physical and chemical changes. A physical change alters the form of a substance but does not change its chemical composition, while a chemical change transforms a substance into one with different properties. Some signs of a chemical change include color changes, precipitation, gas production, temperature changes, and changes in characteristic properties like odor. Examples are provided of changes that are physical, like cutting paper or a disappearing puddle, versus those that are chemical, such as burning toast or rocket fuel.
physical and chemical changes
A chemical change alters the chemical makeup of a substance, creating a new substance with different properties through a chemical reaction where matter is neither created nor destroyed. Examples of chemical changes include fire and mixing baking soda and vinegar. A physical change only modifies a substance's size, shape, volume, or state of matter without chemically altering its makeup, such as melting ice, breaking glass, or chopping wood.
Physical & chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes that affect physical properties but do not form new substances, while chemical changes form new substances with different properties and identities. Examples of physical changes given include state changes like melting and dissolving, while chemical changes include cooking, burning, and rusting. Signs that a chemical change is occurring include changes in color, odor, production of heat, fizzing or bubbling, sound, and light. The document asks readers to identify examples as physical or chemical changes.
Physical & chemical change
Physical changes alter a substance's physical properties but do not create new substances, and are typically reversible. Melting ice into water is a physical change that can be reversed by freezing the water back into ice. Dissolving salt into water is also a physical change, as the salt can be retrieved by evaporating the water. Chemical changes form new substances through chemical reactions, with the new substances possessing different chemical properties and changes often not being reversible.
Changes in matter.pptx 20013 2014 ( Physical and chemical change)
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. It then provides examples of physical changes like tearing paper, folding a handkerchief, and mixtures. Chemical changes form new substances, like rusting iron or souring milk. Finally, it defines physical changes as changes in size, shape or appearance without new substances, while chemical changes result in new substances and altered properties.
Chemical & Physical Change Review
This document provides information about studying for a science lab test. It discusses key concepts to review like the properties of matter, how to study lab tools and techniques, and definitions of important science terms. Specific advice includes practicing with lab tools, making graphs, memorizing definitions, using online quizzing resources, and having peers quiz you. Some example review topics are chemical and physical changes, endothermic and exothermic reactions, the law of conservation of mass, phase changes, and the water cycle.
Changes in Matter
Physical changes alter the state or form of a substance without changing its chemical identity, and are reversible. Chemical changes transform one or more substances into new substances with different properties, are indicated by color changes, formation of precipitates or gas bubbles, production of heat or light, and are not easily reversible. Physical and chemical changes can be distinguished by whether the identity of the substance is conserved and if the change is reversible.
Physical And Chemical Changes
The document compares physical and chemical properties of substances and changes. Physical changes do not alter a substance's identity and can often be reversed, such as melting or freezing. Chemical changes create new substances with different properties through chemical reactions. Clues that a chemical change is occurring include color changes, production of gases, heat, or new odors. Chemical changes like baking a cake cannot be undone since new substances are formed.
Chemical And Physical Changes Quiz 1
The document is a quiz about chemical and physical changes for 5th grade physical science students. It contains multiple choice questions about examples of physical and chemical changes, such as nitrogen becoming a liquid through cooling, water changing state through boiling and freezing, and ice melting into water. It also asks students to identify clues that a chemical change occurred, like a change in color or smell.
Physical Or Chemical Change Qz
Physical changes are changes that do not result in a new substance and can sometimes be reversed, such as melting, freezing, breaking, and cutting. Chemical changes result in new substances through chemical reactions, such as burning, digestion, and rusting, and cannot be reversed. The document provides examples of both physical and chemical changes and discusses their distinguishing properties.
Chemical and Physical Changes
A physical change alters a substance's physical properties like shape, size, or state, but does not create new substances. A chemical change produces new substances through chemical reactions, altering both physical and chemical properties. Some key differences are that physical changes are typically reversible without new substances forming, while chemical changes are permanent reactions that form new substances through energy absorption or release. Rusting of iron is a chemical change that occurs when iron reacts with oxygen and water in the air, forming hydrated iron oxide (rust) which damages the iron over time.
Changing Matter
The document discusses two types of changes: physical changes and chemical changes. It provides examples of each type of change and notes that chemical changes result in new substances being formed, while physical changes do not. The document also compares and contrasts physical and chemical changes. It notes that chemical changes are permanent and difficult to reverse, while physical changes are temporary and can be reversed.
Physical and chemical changes
Changes in matter are classified into physical and chemical changes.Physical Changes are those in which the identifying properties of substances remain unchanged. Chemical Changes are those in which new substances with new properties are formed.
Unit b matter and chemical change notes(physical & chemical changes)
Physical changes alter a substance's state but not its chemical composition, allowing separation back into original substances like melting ice cream. Chemical changes form new substances that are different from reactants, identified by a change in color, odor, formation of solids or gases, or release of energy like light and heat. Physical and chemical changes are distinguished by whether the original substances can be recovered after the change.
Physical vs chemical change
Physical changes alter the size, shape, or form of matter but do not create new substances, and can often be reversed, such as freezing and melting water or chopping celery. Chemical changes result in new substances through molecular rearrangements that cannot be undone, like rust forming on nails, fireworks exploding, or cookies baking. Chemical reactions exhibit telltale signs like producing gas, releasing heat, forming precipitates, or causing color changes.
8 chapter7section2part1
This document discusses physical properties and physical changes of matter. It defines physical properties as observable or measurable characteristics of matter that do not change its identity. Six examples of physical properties are provided: state of matter, malleability, conductivity, density, solubility, and ductility. Density is discussed in more detail, defining it as the relationship between mass and volume. Physical changes are defined as changes that affect physical properties but do not change the identity of the matter. Examples of physical changes include freezing water to make ice and dissolving sugar in water.
Physical and chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes in a substance's appearance or state without producing a new substance. Chemical changes produce new substances through chemical reactions. Examples of each type of change are provided, along with activities and demonstrations to illustrate the differences between physical and chemical changes. Key terms related to changes in matter are also defined.
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chemical and phsical changes
1) The document discusses physical and chemical changes, providing examples of each from everyday life.
2) A physical change alters a substance's physical properties like shape, size, or state but does not create new substances. It is generally reversible.
3) A chemical change produces new substances through chemical reactions. It is accompanied by changes in heat, light, smell, color or gas production and is not reversible. Common examples are burning, rusting, and food spoilage.
Physical change or chemical change
A physical change can be reversed and only alters the shape or form of the material, while a chemical change produces new substances that cannot be reversed back to the original forms. Toasting bread and burning wood are examples of chemical changes, as the original substances cannot be recovered, while shaping clay into pots is a physical change since it remains clay just in a different shape. Determining if a change is physical or chemical is not always clear cut and may require microscopic examination in some cases.
Physical & chemical change
This document discusses the difference between physical and chemical changes in matter. A physical change alters the form or properties of a substance without changing its chemical composition, such as cutting, crushing, dissolving, or changes in state. A chemical change results in one or more new substances being formed through chemical reactions, evidenced by signs like color change, bubbling, gas production or temperature change. Examples of physical changes given are melting ice, sawing wood, and evaporating a puddle. Chemical change examples include burning fuels, baking a cake, and dissolving sugar in tea.
Physical and chemical changes of matter
This document discusses physical and chemical changes of matter. It provides examples of physical changes such as melting, dissolving, and grinding, which change a substance's appearance or state but not its chemical composition. Chemical changes, like burning paper or sugar, produce new substances with different properties from the original. The key difference is that physical changes alter appearance or state while chemical changes alter the actual molecular structure and identity of a substance.
Changes that Matter Undergoes
This document summarizes the differences between physical and chemical changes in matter. It defines matter as anything that occupies space and has mass. A physical change alters the form of matter but does not create a new substance, and may be reversible. A chemical change produces a new substance that cannot be changed back to the original by ordinary means. Examples of each type of change are provided for classification exercises.
Physical or chemical changes
This document discusses the differences between physical and chemical changes. A physical change alters the form of a substance but does not change its chemical composition, while a chemical change transforms a substance into one with different properties. Some signs of a chemical change include color changes, precipitation, gas production, temperature changes, and changes in characteristic properties like odor. Examples are provided of changes that are physical, like cutting paper or a disappearing puddle, versus those that are chemical, such as burning toast or rocket fuel.
physical and chemical changes
A chemical change alters the chemical makeup of a substance, creating a new substance with different properties through a chemical reaction where matter is neither created nor destroyed. Examples of chemical changes include fire and mixing baking soda and vinegar. A physical change only modifies a substance's size, shape, volume, or state of matter without chemically altering its makeup, such as melting ice, breaking glass, or chopping wood.
Physical & chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes that affect physical properties but do not form new substances, while chemical changes form new substances with different properties and identities. Examples of physical changes given include state changes like melting and dissolving, while chemical changes include cooking, burning, and rusting. Signs that a chemical change is occurring include changes in color, odor, production of heat, fizzing or bubbling, sound, and light. The document asks readers to identify examples as physical or chemical changes.
Physical & chemical change
Physical changes alter a substance's physical properties but do not create new substances, and are typically reversible. Melting ice into water is a physical change that can be reversed by freezing the water back into ice. Dissolving salt into water is also a physical change, as the salt can be retrieved by evaporating the water. Chemical changes form new substances through chemical reactions, with the new substances possessing different chemical properties and changes often not being reversible.
Changes in matter.pptx 20013 2014 ( Physical and chemical change)
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. It then provides examples of physical changes like tearing paper, folding a handkerchief, and mixtures. Chemical changes form new substances, like rusting iron or souring milk. Finally, it defines physical changes as changes in size, shape or appearance without new substances, while chemical changes result in new substances and altered properties.
Chemical & Physical Change Review
This document provides information about studying for a science lab test. It discusses key concepts to review like the properties of matter, how to study lab tools and techniques, and definitions of important science terms. Specific advice includes practicing with lab tools, making graphs, memorizing definitions, using online quizzing resources, and having peers quiz you. Some example review topics are chemical and physical changes, endothermic and exothermic reactions, the law of conservation of mass, phase changes, and the water cycle.
Changes in Matter
Physical changes alter the state or form of a substance without changing its chemical identity, and are reversible. Chemical changes transform one or more substances into new substances with different properties, are indicated by color changes, formation of precipitates or gas bubbles, production of heat or light, and are not easily reversible. Physical and chemical changes can be distinguished by whether the identity of the substance is conserved and if the change is reversible.
Physical And Chemical Changes
The document compares physical and chemical properties of substances and changes. Physical changes do not alter a substance's identity and can often be reversed, such as melting or freezing. Chemical changes create new substances with different properties through chemical reactions. Clues that a chemical change is occurring include color changes, production of gases, heat, or new odors. Chemical changes like baking a cake cannot be undone since new substances are formed.
Chemical And Physical Changes Quiz 1
The document is a quiz about chemical and physical changes for 5th grade physical science students. It contains multiple choice questions about examples of physical and chemical changes, such as nitrogen becoming a liquid through cooling, water changing state through boiling and freezing, and ice melting into water. It also asks students to identify clues that a chemical change occurred, like a change in color or smell.
Physical Or Chemical Change Qz
Physical changes are changes that do not result in a new substance and can sometimes be reversed, such as melting, freezing, breaking, and cutting. Chemical changes result in new substances through chemical reactions, such as burning, digestion, and rusting, and cannot be reversed. The document provides examples of both physical and chemical changes and discusses their distinguishing properties.
Chemical and Physical Changes
A physical change alters a substance's physical properties like shape, size, or state, but does not create new substances. A chemical change produces new substances through chemical reactions, altering both physical and chemical properties. Some key differences are that physical changes are typically reversible without new substances forming, while chemical changes are permanent reactions that form new substances through energy absorption or release. Rusting of iron is a chemical change that occurs when iron reacts with oxygen and water in the air, forming hydrated iron oxide (rust) which damages the iron over time.
Changing Matter
The document discusses two types of changes: physical changes and chemical changes. It provides examples of each type of change and notes that chemical changes result in new substances being formed, while physical changes do not. The document also compares and contrasts physical and chemical changes. It notes that chemical changes are permanent and difficult to reverse, while physical changes are temporary and can be reversed.
Physical and chemical changes
Changes in matter are classified into physical and chemical changes.Physical Changes are those in which the identifying properties of substances remain unchanged. Chemical Changes are those in which new substances with new properties are formed.
Unit b matter and chemical change notes(physical & chemical changes)
Physical changes alter a substance's state but not its chemical composition, allowing separation back into original substances like melting ice cream. Chemical changes form new substances that are different from reactants, identified by a change in color, odor, formation of solids or gases, or release of energy like light and heat. Physical and chemical changes are distinguished by whether the original substances can be recovered after the change.
Physical vs chemical change
Physical changes alter the size, shape, or form of matter but do not create new substances, and can often be reversed, such as freezing and melting water or chopping celery. Chemical changes result in new substances through molecular rearrangements that cannot be undone, like rust forming on nails, fireworks exploding, or cookies baking. Chemical reactions exhibit telltale signs like producing gas, releasing heat, forming precipitates, or causing color changes.
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Changes in matter.pptx 20013 2014 ( Physical and chemical change)
Changes in matter.pptx 20013 2014 ( Physical and chemical change)
Unit b matter and chemical change notes(physical & chemical changes)
Unit b matter and chemical change notes(physical & chemical changes)
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This document discusses physical properties and physical changes of matter. It defines physical properties as observable or measurable characteristics of matter that do not change its identity. Six examples of physical properties are provided: state of matter, malleability, conductivity, density, solubility, and ductility. Density is discussed in more detail, defining it as the relationship between mass and volume. Physical changes are defined as changes that affect physical properties but do not change the identity of the matter. Examples of physical changes include freezing water to make ice and dissolving sugar in water.
Physical and chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes in a substance's appearance or state without producing a new substance. Chemical changes produce new substances through chemical reactions. Examples of each type of change are provided, along with activities and demonstrations to illustrate the differences between physical and chemical changes. Key terms related to changes in matter are also defined.
CBSE-Class-7-NCERT-Science-Book-Physical-and-Chemical-Changes-chapter-6.pdf
Physical and chemical changes can be distinguished based on whether new substances are formed. A physical change alters a substance's physical properties but does not create new materials, while a chemical change produces one or more new substances through chemical reactions. Examples provided demonstrate that rusting of iron, burning of magnesium, and reactions of copper sulfate are chemical changes, while cutting of paper and melting of ice are physical changes. Crystallization is identified as a physical change that forms pure substances from their solutions.
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This document discusses different types of matter and changes in states of matter. It defines matter as anything that takes up space and has mass, and describes the three common states as solids, liquids, and gases. Examples are given of materials in each state. Physical changes that do not alter the chemical makeup of a substance, like melting, boiling, and condensation, are distinguished from chemical changes where new substances are formed. The document also defines homogeneous materials as having identical properties throughout and heterogeneous materials as having varying properties due to different components.
7 physical and chemical changes
1. The document discusses physical and chemical changes. Physical changes alter a substance's physical properties but do not form new substances, while chemical changes produce new substances through chemical reactions.
2. Examples of physical changes given are cutting paper, crushing chalk to make dust, and melting ice to form water. Chemical changes form rust from iron, burn magnesium to form ash, and produce carbon dioxide from vinegar and baking soda.
3. Crystallization is described as a physical change that forms pure crystals from dissolved substances as they cool, using copper sulfate as an example. Rusting of iron is a chemical reaction that forms iron oxide.
Physical and chemical change
Project Name: Chemical and Physical changes
Chemical and Physical changes occur around us in day-to-day life, in our surroundings. Understanding them will help us better understand our world.
1. CHANGE
Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. (Source: Scientific Change - Encyclopedia of Scientonomy) .
It can be of two types:
1. Chemical Change
2. Physical Change
CHEMICAL CHANGE:
Change in shape and size of a substance by forming a new substance with new properties.
The new substance formed cannot be turned back into its original state.
PHYSICAL CHANGE:
Change in shape and size of a substance that does not alter the properties of a substance.
A substance formed may be turned back into its original state.
Fact: The burning of the candle represents both physical and chemical change. As it melts physically it changes its states, while chemically CO2 (a gas) release during the burning of the candle.
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The document discusses reversible and irreversible changes to matter. It defines reversible changes as those where matter changes shape or volume but not structure or components, through physical changes. Irreversible changes are chemical changes that produce a new substance. Examples of reversible changes given are melting of ice and crushing, while examples of irreversible changes are frying of eggs and burning of wood or candle. The document provides information on classifying and identifying physical and chemical properties and changes to states of matter.
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This document discusses physical and chemical changes through a series of experiments involving changes of state, dissolving substances, burning substances, and flame tests. It defines a physical change as one where the original substance can be recovered, while a chemical change produces a new substance that cannot be recovered. Experiments show dissolving and burning substances are chemical changes, while changes of state like melting and freezing are physical changes.
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This document provides information about the three states of matter: solids, liquids, and gases. It defines each state, provides examples, and discusses physical and chemical changes. Users can learn about each state through short sections and then test their knowledge with a multiple choice quiz at the end.
Changes in matter.pptx 20013 2014
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. Examples of physical changes discussed include tearing paper, molding clay, and folding a handkerchief. Chemical changes discussed include rusting iron, souring milk, and ripening fruits. A physical change alters the appearance of matter but does not change its chemical composition, while a chemical change produces new substances. The document seeks to demonstrate the difference between physical and chemical changes in various examples and situations.
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In this lesson you will learn the physical change and chemical change are changes happened in matter.
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Physical verus chemical changes (reversible and irreversible changes
This document discusses physical and chemical changes. It defines irreversible changes as permanent changes that cannot be undone, involving chemical reactions that produce new materials. Reversible changes are changes that can be undone, involving only physical changes in state or form. Some examples of each are provided, like baking being irreversible while melting and freezing are reversible. Criteria for identifying chemical versus physical changes are outlined. The document concludes by introducing an activity to set up crystal geodes.
properties of matter.ppt
This document discusses the properties and changes of matter. It defines matter as anything that takes up space and is made of tiny particles called atoms. Matter exists in three states - solids, liquids, and gases. Solids have a fixed shape and volume, liquids take the shape of their container but have a fixed volume, and gases have no fixed shape or volume. Matter undergoes physical changes, which alter its properties but not its chemical makeup, and chemical changes, which create new substances through atomic rearrangement. Physical and chemical changes are illustrated with everyday examples.
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This document discusses physical and chemical changes. It provides examples of each type of change and outlines their key differences. A physical change alters a substance's physical properties but does not form new substances, is usually reversible, and involves little energy change. A chemical change produces new substances with different chemical compositions through irreversible reactions, and significant energy is absorbed or released. Examples of physical changes include melting, freezing, and cutting; chemical changes include burning fuels and the reaction of vinegar with baking soda.
Changes in matter.pptx 20013 2014
This document discusses physical and chemical changes in matter. It provides examples of physical changes such as melting, freezing, evaporation and condensation. Chemical changes result in new substances forming, like rusting, burning, and cooking. The key questions are how matter changes and the importance of understanding matter's properties and types. The objectives are to analyze how matter changes physically and chemically, and demonstrate ways matter undergoes property changes.
Physical Changes
A physical change alters an object's physical properties but does not change its chemical composition. Physical changes include changes in size, shape, and state of matter. They can often be reversed, such as cutting and rejoining a piece of paper or melting and resolidifying a solid. Examples of physical changes provided in the document are cutting paper, molding clay, changes of state between solid, liquid and gas, and forming mixtures and solutions.
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This document provides an overview of ratios and proportions based on the NCERT syllabus for JEE Maths B2A. It defines ratio as quantities of the same kind represented by A:B or the fraction A/B, and defines proportions as equal ratios such that a:b = c:d. It lists important properties of proportions including the product of extremes equals the product of means and inverse, alternate, componendo, and dividend properties. It then transitions to solving equations and inequalities related to ratios and proportions.
JEE Mathematics B2A in Tamil | Season 0, Episode 3 | Fundamentals of Mathemat...
The document provides information about polynomials including:
1) The definition of a polynomial as an expression involving terms of various integer powers of x with the highest power term having a non-zero coefficient.
2) The remainder theorem which states that if a polynomial p(x) is divided by a binomial x-a, the remainder is equal to p(a).
3) The factor theorem which states that if a polynomial f(x) is equal to 0 at x=a, then (x-a) is a factor of the polynomial.
JEE Mathematics B2A in Tamil | Season 0, Episode 2 | Fundamentals of Mathemat...
This document provides formulas and examples related to polynomials for JEE math preparation. It includes:
1) Formulas for expanding and factorizing polynomial expressions like (a+b)2, (a-b)3, a3 + b3, etc.
2) Examples of problems involving polynomials like finding the value of expressions given certain conditions.
3) A problem asking to find real numbers a and b given their sum in a quadratic equation.
4) A problem factorizing the polynomial x4 + 5x2 + 9.
5) An example of simplifying a complex polynomial expression.
Fundamental of Mathematics - Number system
This document provides an overview of different number systems including natural numbers, integers, rational numbers, and irrational numbers. It defines key terms such as prime numbers, composite numbers, co-prime numbers, and twin prime numbers. Examples are given for each type of number. The document also discusses properties of integers, rational numbers, and irrational numbers. It provides questions to test understanding of different number concepts covered.
Force and pressure introduction - Yoonus
Force is a push or pull that causes motion or changes the motion of an object. Forces act between two interacting objects. The motion of objects is caused by the action of a force - for example, a magnet attracts iron due to the force of attraction. A push is when one object exerts a force to move another object away, while a pull is when an object exerts a force to move another object towards itself. Forces can add up if acting in the same direction or subtract if acting in opposite directions. The strength and direction of a force determines its effect.
Force and pressure - state of motion
The document discusses the effects that forces can have on objects. It states that a force can change an object's speed by either increasing or decreasing it depending on whether the force is applied in the same or opposite direction of the object's motion. A force can also change an object's direction of motion or shape. However, a force does not always result in a change in an object's state of motion, as experience shows that sometimes applying a force does not change an object's motion. Forces are also categorized as either contact forces, which require physical contact, or non-contact forces, which act over a distance.
Force and pressure - Pressure
Pressure is defined as force per unit area. It is exerted by both liquids and gases on the walls of their containers. Atmospheric pressure is caused by the weight of air in the atmosphere and it is very large, as demonstrated by the force needed to remove a sucker from a surface or the inability of eight horses to pull apart evacuated hemispheres. The human body can withstand this pressure because internal and external pressures are equal.
Force and pressure - kinds of forces
Force can be defined as a push or pull that causes an object to be in motion or attempt to change its motion. There are several different types of forces including contact forces like muscular and frictional forces, and non-contact forces like magnetic, electrostatic, and gravitational forces. Muscular force allows humans and animals to perform physical tasks, while friction always acts opposite to an object's motion and eventually stops rolling objects. Magnetic force causes attraction or repulsion between magnets without contact, and electrostatic force allows charged objects to influence each other at a distance. Gravitational force is responsible for all objects being pulled toward Earth and other massive bodies.
Acid, Bases and salts | Indicators
This is 7th standard science topics.
Chapter 5
Acid bases and salts.
In that the sub category is Indicators
Current electricity | Fuse, Series and parallel
This slide is part 3 of current electricity. We have uploaded lot more before. check that out and then study well.
Thank you.
Electricity - Resistors in series and parallel
Resistors in series and parallel.
For more other electricity chapters see our other files.
Electricity 10th standard science - physics.
Electricity
Electricity. Ohms law. and all other 10th standard physics concepts part 1.
see other parts for more information.
Current electricity Part -1
10th standard science chapter Tamil Nadu state board syllabus - chapter 12.
This is just a part 1 of current electricity chapter.
The next parts are available here, just check it out and learn Electricity.
Practical Learning and assessment
Advantages and disadvantages in practical learning method and practical assessment.
Why there is a practical learning in education?
B.Ed., course paper.
Role of ICT in examination
This document discusses the role of information and communication technology (ICT) in educational assessment. It states that ICT has led to changes in assessment by allowing for new formats like computer-based testing and higher-order learning outcomes. ICT can be used to support both formative and summative assessment. Examples of ICT tools for assessment include online testing platforms, survey tools, and software for creating and scoring tests. ICT also facilitates project-based assessment and helps support students with disabilities.
Details about CUCET entrance exam
CUCET entrance exam is for entering into Different central universities around India.
This ppt is specially based on CUTN (Central University of TamilNadu)
Applications of differential equation in Physics and Biology
This document discusses several applications of differential equations in physics. It provides examples of how differential equations are used to model radioactive decay, linear and projectile motion, harmonic oscillations, and more. Solving these differential equations provides insights into the physical processes being modeled and has allowed technological progress across many scientific disciplines. Differential equations are necessary to describe most physical phenomena accurately because real-world relationships are typically non-linear rather than linear.
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Trigonometry formulas | JEE Mathematics in Tamil | Season 0, Episode 7 | Fund...
Trigonometry formulas | JEE Mathematics in Tamil | Season 0, Episode 7 | Fund...
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JEE Mathematics B2A in Tamil | Season 0, Episode 3 | Fundamentals of Mathemat...
JEE Mathematics B2A in Tamil | Season 0, Episode 2 | Fundamentals of Mathemat...
JEE Mathematics B2A in Tamil | Season 0, Episode 2 | Fundamentals of Mathemat...
Applications of differential equation in Physics and Biology
Applications of differential equation in Physics and Biology
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Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
原版制作(carleton毕业证书)卡尔顿大学毕业证硕士文凭原版一模一样
原版纸张【微信：741003700 】【(carleton毕业证书)卡尔顿大学毕业证】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
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6:个人职称评审加20分
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Plant breeding for disease resistance is a strategy to reduce crop losses caused by disease. Plants have an innate immune system that allows them to recognize pathogens and provide resistance. However, breeding for long-lasting resistance often involves combining multiple resistance genes
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
The debris of the ‘last major merger’ is dynamically young
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
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Applied Science: Thermodynamics, Laws & Methodology.pdf
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
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https://ashpc.eu/
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Nucleophilic Addition of carbonyl compounds.pptx
Nucleophilic addition is the most important reaction of carbonyls. Not just aldehydes and ketones, but also carboxylic acid derivatives in general.
Carbonyls undergo addition reactions with a large range of nucleophiles.
Comparing the relative basicity of the nucleophile and the product is extremely helpful in determining how reversible the addition reaction is. Reactions with Grignards and hydrides are irreversible. Reactions with weak bases like halides and carboxylates generally don’t happen.
Electronic effects (inductive effects, electron donation) have a large impact on reactivity.
Large groups adjacent to the carbonyl will slow the rate of reaction.
Neutral nucleophiles can also add to carbonyls, although their additions are generally slower and more reversible. Acid catalysis is sometimes employed to increase the rate of addition.
ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptx
Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
Although Artemia has been known to man for centuries, its use as a food for the culture of larval organisms apparently began only in the 1930s, when several investigators found that it made an excellent food for newly hatched fish larvae (Litvinenko et al., 2023). As aquaculture developed in the 1960s and ‘70s, the use of Artemia also became more widespread, due both to its convenience and to its nutritional value for larval organisms (Arenas-Pardo et al., 2024). The fact that Artemia dormant cysts can be stored for long periods in cans, and then used as an off-the-shelf food requiring only 24 h of incubation makes them the most convenient, least labor-intensive, live food available for aquaculture (Sorgeloos & Roubach, 2021). The nutritional value of Artemia, especially for marine organisms, is not constant, but varies both geographically and temporally. During the last decade, however, both the causes of Artemia nutritional variability and methods to improve poorquality Artemia have been identified (Loufi et al., 2024).
Brine shrimp (Artemia spp.) are used in marine aquaculture worldwide. Annually, more than 2,000 metric tons of dry cysts are used for cultivation of fish, crustacean, and shellfish larva. Brine shrimp are important to aquaculture because newly hatched brine shrimp nauplii (larvae) provide a food source for many fish fry (Mozanzadeh et al., 2021). Culture and harvesting of brine shrimp eggs represents another aspect of the aquaculture industry. Nauplii and metanauplii of Artemia, commonly known as brine shrimp, play a crucial role in aquaculture due to their nutritional value and suitability as live feed for many aquatic species, particularly in larval stages (Sorgeloos & Roubach, 2021).
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EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
The debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically young
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Applied Science: Thermodynamics, Laws & Methodology.pdf
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bordetella pertussis.................................ppt
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The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptx
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
Sharlene Leurig - Enabling Onsite Water Use with Net Zero Water
physical and chemical changes | Physical change
- 1. <date/time> <footer> 1 6. Physical and Chemical Changes Physical changes
- 2. Change Changes in our surroundings. Making a sugar solution is a change. Setting curd from milk is a change. Souring of milk is a change. Stretched rubber band also represents a change. Make a list of ten changes you have noticed around you.
- 3. Activity 6.1 You cannot join the pieces back to make the original piece. Is there a change in the property of the paper
- 4. Activity 6.2 Collect the chalk dust by crush a small piece of chalk. Add a little water to the dust to make a paste. Roll it into the shape of a piece of chalk. Let it dry. Did you recover chalk from the dust?
- 5. Activity 6.3 and 6.4
- 6. Activity 6.5 Keep the tip of the free end of the blade on the gas stove. Does the colour of the tip of the blade change? Remove the blade from the flame. Observe the tip once again after some time. Does it get back its original colour?
- 7. Changes Physical Change Chemical Change Properties such as shape, size, colour and state of a substance are called its physical properties. A change in which a substance undergoes a change in its physical properties is called a physical change. A physical change is generally reversible. In such a change no new substance is formed A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
- 10. Activity 6.6