U5Q1 Chem/Phys

Front

What is a chemical change?

Back

A chemical change is a process that results in the formation of one or more new substances with different properties from the original substances.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

What happens to particles during a physical change?

Back

During a physical change, the arrangement of particles may change, but the particles themselves remain the same.

Front

What happens to particles during a chemical change?

Back

During a chemical change, the bonds between particles break and new bonds form, resulting in new substances.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as melting and freezing, but some may not be easily reversible.

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Can a chemical change be reversed?

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Chemical changes are often not easily reversible, as they involve the formation of new substances.

Front

What is an example of a physical change?

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An example of a physical change is tearing a piece of paper or melting ice.

Front

What is an example of a chemical change?

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An example of a chemical change is rust forming on iron or baking a cake.

Front

How does temperature affect physical changes?

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Temperature can affect the state of matter; for example, heating can cause solids to melt into liquids.