Physical and Chemical Changes

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances, often accompanied by energy changes.

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 baking a cake.

Front

Give an example of a physical change.

Back

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

Front

What evidence indicates a chemical change has occurred?

Back

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

Front

What evidence indicates a physical change has occurred?

Back

Change in shape, size, or state of matter without forming a new substance.

Front

What state of matter has tightly packed particles?

Back

Solid.

Front

What state of matter has loosely packed particles?

Back

Liquid.

Front

What state of matter has particles that are far apart?

Back

Gas.

Front

What happens to the particles in a substance during a physical change?

Back

The arrangement or movement of particles changes, but the substance remains the same.