Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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 sign that a chemical reaction has occurred?

Back

Formation of a gas, change in color, temperature change, or the production of light.

Front

Is melting ice a chemical or physical change?

Back

Physical change.

Front

Is burning wood a chemical or physical change?

Back

Chemical change.

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 may change their arrangement or state, but their chemical structure remains the same.

Front

Give an example of a chemical change.

Back

Rust forming on iron.

Front

Give an example of a physical change.

Back

Chopping vegetables.

Front

What is tarnishing of silver an example of?

Back

A chemical change.