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Matter and Particle Models

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Matter and Particle Models

A community science team is investigating how materials behave. Use particle models to explain what happens in solids, liquids and gases, and how heating or cooling can change a material.

Read the situation

On a warm afternoon, Talia puts an ice cube in a cup. The ice melts into liquid water. Later, some water disappears from a shallow dish left in the sun. The water has evaporated into the air. The material is still water throughout these changes; its particles have not become larger or changed into a different substance.

1.In which state are particles close together but able to move past one another?
  • Solid
  • Liquid
  • Gas
  • All three states
2.When Talia’s ice cube melts, what happens to the water particles?
  • They stop moving and lock into place.
  • They gain energy and move around one another.
  • They become bigger particles.
  • They spread as far apart as gas particles.
3.In a gas, particles are usually apart and move . When a gas cools enough to become a liquid, its particles lose energy and move .
4.True or false: When liquid water evaporates, each water particle gets larger.
TrueFalse
5.Match each change of state to the change in temperature that usually causes it.
  • Melting
  • Freezing
  • Evaporation
  • Condensation
  • Heating a liquid
  • Heating a solid
  • Cooling a gas
  • Cooling a liquid
6.Water freezes into ice in a freezer. Is this a physical change or a chemical change? Explain what happens to the particles.
7.The shallow dish loses some water on a warm, breezy day. Explain why warmth and moving air can make evaporation happen faster.
8.Draw particle models for a solid, a liquid and a gas. Use identical circles for the particles. Show their spacing and arrangement accurately, then add arrows or a note to show how the particles move.
Label each model: solid, liquid and gas.
9.A student says, “When ice melts, the particles turn into water.” Rewrite this explanation using the words particles, energy and movement.
10.Water vapour touches the cool outside of a glass and forms tiny droplets. Name the change of state and explain what happens to the particles.

3 printable pages

  • Matter and Particle Models, page 1 of 3: Read the situation

    Page 1

  • Matter and Particle Models, page 2 of 3: 5. Match each change of state to the change in temperature that usually causes it.

    Page 2

  • Matter and Particle Models, page 3 of 3: 9. A student says, “When ice melts, the particles turn into water.” Rewrite this…

    Page 3

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