7.6C Physical & 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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes processes like rusting, burning, and cooking.

Front

Is melting ice a physical or chemical change?

Back

Melting ice 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.

Front

Give an example of a physical change.

Back

An example of a physical change is the melting of ice into water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is the rusting of iron.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Front

Is cooking an egg a physical or chemical change?

Back

Cooking an egg is a chemical change.