Physical and Chemical Changes - GL

Front

What is a Chemical Change?

Back

A process where substances combine or break apart to form new substances with different properties.

Front

What is a Physical Change?

Back

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

Front

Give an example of a Chemical Change.

Back

Burning wood, rusting iron, or fireworks exploding.

Front

Give an example of a Physical Change.

Back

Melting ice, boiling water, or dissolving sugar in water.

Front

What happens to the molecules during a Chemical Change?

Back

The molecules rearrange to form new substances.

Front

What happens to the molecules during a Physical Change?

Back

The molecules remain the same but may change in form or appearance.

Front

Is cooking an egg a Chemical Change or Physical Change?

Back

Chemical Change.

Front

Is freezing water a Chemical Change or Physical Change?

Back

Physical Change.

Front

What is an indicator of a Chemical Change?

Back

Color change, gas production, temperature change, or formation of a precipitate.

Front

What is an indicator of a Physical Change?

Back

Change in state (solid, liquid, gas) or shape without new substances forming.