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States of Matter

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States of Matter

Explore how solids, liquids and gases behave. Read each question carefully. For multiple-choice questions, choose one answer; for matching, write the correct letter beside each change of state.

Spot the states

Matter is anything that has mass and takes up space. Solids, liquids and gases are three common states of matter.

1.In which state of matter are the particles close together but arranged irregularly, so they can move past one another?
  • Solid
  • Liquid
  • Gas
2.A sealed syringe contains air. If you push the plunger in, the air can be squeezed into a smaller space. Which property of gas does this show?
3.Complete the sentence: A solid keeps its own shape, while a liquid flows and takes the shape of its .

Follow the changing water

Water can change state when it gains or loses heat energy. The water itself does not disappear when it changes state.

4.Match each change of state to what happens. Write the correct letter beside each term. A. Liquid changes to solid B. Gas changes to liquid C. Solid changes to liquid D. Liquid changes to gas
  • Melting
  • Freezing
  • Evaporation
  • Condensation
  • D
  • C
  • B
  • A
5.A puddle becomes smaller after a sunny afternoon, even though it has not boiled. What change of state has happened to some of the water?
6.True or false? When water freezes into ice, its particles stop existing.
TrueFalse

Explain the evidence

Use what you know about particles and heating to solve the final challenges.

7.On a cold morning, tiny water droplets appear on the outside of a glass filled with ice water. Explain where the droplets came from and name the change of state.
8.A chocolate button warms in your hand and becomes runny. Describe what happened to its state and what the added heat did to its particles.

2 printable pages

  • States of Matter, page 1 of 2: Spot the states, Follow the changing water

    Page 1

  • States of Matter, page 2 of 2: Explain the evidence

    Page 2

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