Chemical and Physical Changes

Front

What is a physical change?

Back

A physical change is a change that does not result in the formation of a new substance. Examples include melting, freezing, and shredding.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of one or more new substances with different properties. Examples include rusting and burning.

Front

Which type of change can be undone?

Back

Physical change can be undone.

Front

If you mix 1 gram of salt with 50 grams of water, how many grams of matter will you have after the salt is completely dissolved?

Back

51 grams.

Front

What happens to the atoms during a chemical change?

Back

The atoms rearrange themselves and bond together differently to form new products.

Front

What happens to the atoms during a physical change?

Back

The atoms remain the same; only their arrangement or state changes.

Front

Give an example of a physical change.

Back

Shredding a piece of paper.

Front

Give an example of a chemical change.

Back

Rust forming on an iron fence.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change.

Front

Is baking a cake a physical or chemical change?

Back

Baking a cake is a chemical change.