Unit Review

What is Matter?Matter is anything that takes up space

and has weight.

Matter has three forms.

Matter can be a solid, a liquid, or a gas.

Matter is made up of tiny particles called molecules.

What do we know about solids?Solids take up space

and have mass.Solids have a shape

of their own.Solids can be

described by their physical properties.

Solids can be measured.

What do we know about liquids?Liquids take up

space and have mass.

Liquids do not have a shape of their own.

Liquids take the shape of their container.

Liquids can be measured (mass and volume).

What do we know about gases?A gas takes up space

and has mass.A gas takes the shape

of its container.A gas is the only kind

of matter that always fills all the space inside a container.

The mass of a gas can be measured.

Physical Changes in MatterCutting

Mixing

Shaping

Changing from one state of matter to another.

Melting

Freezing

Evaporating

Other changes in matter

Some changes in matter are reversible.

Some changes in matter are irreversible.

Rusting, burning, and cooking are irreversible changes.

Wonderful Water

Water can be a solid, a liquid, or a gas.Water as a solid may be ice or snow.Water as a liquid may be drinking water.Water as a gas is water vapor.Heat changes water from one form to

another. Water in all three states make up the water

cycle.