Physical vs. Chemical Change

Front

What is a physical change?

Back

A physical change is a change that affects the form of a chemical substance, but not its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas is a sign that a chemical reaction has occurred.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Melting butter for popcorn is a physical change.

Front

What happens when blue liquid and yellow liquid are mixed?

Back

Mixing blue liquid and yellow liquid results in a green liquid, which is a physical change.

Front

What are some examples of physical changes?

Back

Examples of physical changes include melting ice, boiling water, and dissolving sugar in water.

Front

What are some examples of chemical changes?

Back

Examples of chemical changes include rusting iron, burning wood, and baking a cake.

Front

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

Back

A physical change alters the form of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

What is an indicator of a chemical change?

Back

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

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.