Unit 24 Matter Review

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties, such as wood burning.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that does not form a new substance, like sand and salt.

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance is dissolved in another, such as saltwater.

Front

What are the three phases of matter?

Back

The three phases of matter are solid, liquid, and gas.

Front

What is the characteristic of solids?

Back

Solids have a definite shape and volume, with particles that are closely packed together.

Front

What is the characteristic of liquids?

Back

Liquids take the shape of their container but have a definite volume, with particles that are close but can move past each other.

Front

What is the characteristic of gases?

Back

Gases have no definite shape or volume, with particles that spread out as far as they can.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical composition remains the same, like ice melting.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

Front

What is the particle model of matter?

Back

The particle model of matter explains that all matter is made up of tiny particles that are in constant motion.