Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants.

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

Can a physical change be undone?

Back

Yes, a physical change can often be undone, such as freezing and melting water.

Front

Can a chemical change be undone?

Back

No, a chemical change typically cannot be undone, as it results in the formation of new substances.

Front

What is an example of a chemical change?

Back

Rust forming on an iron fence is an example of a chemical change.

Front

What is an example of a physical change?

Back

Shattering a glass bottle is an example of a physical change.

Front

What happens to the mass of an object during a physical change?

Back

The mass of an object remains the same during a physical change, regardless of its form.

Front

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

Back

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

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.

Front

What are some indicators of a physical change?

Back

Indicators of a physical change include changes in state (solid, liquid, gas), shape, and size.