Exploring Matter

1
Exploring Matter

• Unit Review

2
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.

3
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.

4
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).

5
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.

6
Physical Changes in Matter

• Cutting
• Mixing
• Shaping
• Changing from one state of matter to another.

• Melting
• Freezing
• Evaporating

7
Other changes in matter

• Some changes in matter are reversible.
• Some changes in matter are irreversible.
• Rusting, burning, and cooking are irreversible
  changes.

8
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.