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, involving a rearrangement of atoms.

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 is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What evidence indicates a physical change has occurred?

Back

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

Front

What evidence indicates a chemical change has occurred?

Back

Evidence of a chemical change includes color change, gas production, temperature change, and the formation of a precipitate.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Dissolving sugar in water is a physical change.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.