Physical and Chemical Changes

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 is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What happens to the substance in a physical change?

Back

The substance remains the same, but its form or appearance may change.

Front

What happens to the substance in a chemical change?

Back

The substance changes into one or more new substances with different properties.

Front

What is evidence of a physical change?

Back

Evidence of a physical change includes changes in shape, size, or state of matter.

Front

What is evidence of a chemical change?

Back

Evidence of a chemical change includes color change, gas production, or formation of a precipitate.

Front

What is an example of a reversible physical change?

Back

Freezing and melting of water is an example of a reversible physical change.

Front

What is an example of an irreversible chemical change?

Back

Burning paper is an example of an irreversible chemical change.