Physical and 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 changes in size, shape, or state of matter.

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 the rearrangement of atoms. Examples include burning, rusting, and digestion.

Front

What happens to matter during a physical change?

Back

Matter remains the same substance before and after the change, meaning it retains its chemical identity.

Front

What happens to matter during a chemical change?

Back

Matter changes into one or more new substances with different properties.

Front

What is condensation?

Back

Condensation is the process by which water vapor in the air is changed into liquid water. It occurs when the air cools and can no longer hold all the moisture.

Front

Give an example of condensation.

Back

Dew forming on grass in the morning is an example of condensation.

Front

What is an example of a physical change?

Back

Cutting a piece of paper is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What happens to water when heat is removed?

Back

When enough heat is removed from water, it can freeze and become a solid (ice).

Front

What is the effect of burning on the weight of an object?

Back

Burning an object typically causes it to lose weight because it transforms into gases and ash.