Chemical and Physical Changes Review

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 breaking.

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 happens to ice when heat is added?

Back

When heat is added to ice, it melts and changes into liquid water.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

How do molecules in a solid behave?

Back

Molecules in a solid move very slowly and are closely packed together.

Front

What is an example of a physical change?

Back

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

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke.

Front

What happens to the molecules in a liquid when it is heated?

Back

When a liquid is heated, its molecules move faster and may eventually turn into a gas.

Front

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

Back

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

Front

What is an example of matter?

Back

An example of matter is water, air, or a rock.