Exploring Matter

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Exploring Matter

• Unit Review

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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.

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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.

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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).

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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.

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Physical Changes in Matter

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

• Melting
• Freezing
• Evaporating

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Other changes in matter

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

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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.

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This concludes our study of matter.