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Physical and Chemical Changes in Matter

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Questions and Answers

Which of the following is an example of a physical change?

Baking a cake

Cutting paper (correct)

Rusting of iron

Burning wood into ash

What is the main difference between physical and chemical changes?

Chemical changes result in the formation of new substances, while physical changes do not (correct)

Physical changes release heat or light, while chemical changes do not

Physical changes produce gas, while chemical changes do not

Physical changes involve a change in color, while chemical changes do not

Which of the following is an indicator of a chemical change?

Molding clay

Melting of ice

Tearing a piece of paper

Production of gas when baking soda and vinegar are mixed (correct)

Which of the following is NOT an example of a physical change?

<p>Baking ingredients transforming into a cake</p> Signup and view all the answers

What is a common indicator of a chemical change that is NOT mentioned in the given text?

<p>Formation of a precipitate</p> Signup and view all the answers

Study Notes

Observing changes in matter is a common occurrence in our daily lives, categorized into physical and chemical changes in science.
Physical changes involve alterations in the form or state of matter without changing the molecular structure, such as ice melting or cutting paper.
Examples of physical changes include molding clay, making a salad, and breaking a glass, where the composition remains the same despite the change in appearance.
Chemical changes occur at the molecular level, resulting in the formation of new substances with different properties, like rust forming on iron, wood burning into ash, or baking ingredients transforming into a cake.
Indicators of chemical changes include color change, production of gas, release of heat or light, as seen in reactions like baking soda and vinegar producing carbon dioxide gas.

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Description

Explore the differences between physical and chemical changes in matter, where physical changes involve alterations in form or state without changing molecular structure, while chemical changes result in the formation of new substances. Learn examples and indicators of both types of changes.