When a gas changes to a liquid, it .......
  • Boils
  • Condenses
  • Melts
  • Sublimes
If matter has energy taken away .......
  • It contracts
  • It expands
  • It vaporizes
  • Nothing happens
Which will have the highest boiling point?
  • Distilled water
  • Pure water
  • Salty water
  • Tap water
When a smell spreads, particles move away from where they originated. This is called .......
  • Condensation
  • Diffusion
  • Dispersion
  • Evaporation
When a solid changes to a liquid, it .......
  • Boils
  • Condenses
  • Freezes
  • Melts
Which is the most dense substance in this list?
  • Aluminium
  • Lead
  • Oxygen
  • Water
The state of matter which has very low density is .......
  • Gas
  • Liquid
  • Solid
  • Solution
If you reduce the volume of a gas .......
  • It expands
  • It gets bigger
  • The pressure increases
  • The temperature falls
Which of these statements about solids is true?
  • They can be compressed easily
  • They do not flow
  • They have no definite volume
  • They take the shape of their container
A balloon is filled with gas. Inside the balloon the gas particles .......
  • Are avoiding each other
  • Are moving slowly
  • Are moving very quickly
  • Are not moving
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