Chemical vs. Physical Changes in matter

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of matter changes, but its chemical composition remains the same. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and baking.

Front

What happens to butter when it melts?

Back

When butter melts, it changes from a solid to a liquid, which is a physical change.

Front

What is an example of a chemical change?

Back

Baking a cake is an example of a chemical change because new substances are formed when the ingredients are mixed and heated.

Front

What occurs when baking soda and vinegar are mixed?

Back

When baking soda and vinegar are mixed, they undergo a chemical change that produces carbon dioxide gas.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical composition.

Front

What is an indicator 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 is an example of a physical change?

Back

An example of a physical change is chopping wood, where the wood's form changes but its chemical composition remains the same.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into new substances with different properties.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but not all.