Physical and Chemical Changes in Matter

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. 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. Examples include rusting, burning, and cooking.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas. Each state has distinct properties and behaviors.

Front

What happens to molecules during melting?

Back

During melting, molecules gain energy and move faster, allowing them to break free from their fixed positions in a solid.

Front

What is vaporization?

Back

Vaporization is the process of turning from a liquid into a gas. It occurs through evaporation or boiling.

Front

What is condensation?

Back

Condensation is the process by which gas turns into a liquid, usually when it cools down.

Front

What is an example of a physical change?

Back

An example of a physical change is chopping wood or breaking glass.

Front

What is an example of a chemical change?

Back

An example of a chemical change is baking a cake, where ingredients react to form a new substance.

Front

What is the difference between evaporation and boiling?

Back

Evaporation occurs at the surface of a liquid at any temperature, while boiling occurs throughout the liquid at a specific temperature.

Front

What is plasma?

Back

Plasma is a state of matter where gas is energized until atomic electrons are no longer associated with the nucleus.