Physical and Chemical Changes

Front

What is a chemical change?

Back

A chemical change is a process where a substance transforms into a different substance with new chemical properties. Examples include burning, rusting, and baking.

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

Is burning coal a chemical or physical change?

Back

Burning coal is a chemical change.

Front

What happens to a substance during a physical change?

Back

During a physical change, the substance changes shape, form, or appearance but remains the same substance.

Front

Is baking a cake a chemical or physical change?

Back

Baking a cake is a chemical change.

Front

What is an example of a chemical change?

Back

Frying an egg is an example of a chemical change.

Front

What is rusting?

Back

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

Front

Is a rusty nail a sign of a chemical change?

Back

Yes, a rusty nail indicates a chemical change has occurred.

Front

What is an example of a physical change?

Back

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

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting.