When a solid is heated, it changes into a liquid. What do we call this process?
  • Condensing
  • Freezing
  • Dissolving
  • Melting
Which of these is true of gases?
  • Unless held in a sealed container, gases keep expanding in volume
  • A gas takes the same shape as its container
  • A gas will have the same volume as its container
  • Gases can be poured from one container to another
What is the freezing point of water?
  • -55o C
  • -12o C
  • 0o C
  • 32o C
When you fill a jug with sugar, it appears to have the same shape as the jug. You can also tip sugar from one container to another. Is sugar a solid, a liquid or a gas?
  • A liquid
  • A solid
  • A gas
  • A condensed gas
Which of these is true of solids?
  • Solids can be cut or shaped
  • A solid expands to fill its container
  • Solids will stay the same shape and size unless acted upon by a force
  • Solids can be grasped (held on to)
Which has the most densely-packed particles?
  • Solids
  • Liquids
  • Gases
  • Particles are equally dense in solids, liquids and gases
Which of these is true of liquids?
  • The shape of a liquid does not change
  • A liquid takes the shape of its container
  • Liquids are runny and can be poured
  • The volume of a liquid does not change
Which of these has the least densely-packed particles?
  • Solids
  • Liquids
  • Gases
  • Both liquids and gases
When a liquid cools enough it becomes a solid. What do we call this process?
  • Evaporating
  • Condensing
  • Freezing
  • Dissolving
What is the boiling point of water?
  • 0o C
  • 50o C
  • 100o C
  • 212o C
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