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YR 5 Chem final revision

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  • Give two examples of evaporation.
  • You feel cool down when you blow your wet hands. What is the name of the process?
    evaporation
  • When carbon dioxide dissolve in the drink, what are the solute and solvent?
    The solute is carbon dioxide and the solvent is the drink
  • A measurement of the amount of heat in a substance is called _______.
    temperature
  • The process that a gas changes into a liquid is called _______.
    condensation
  • Give two soluble pollutants of water?
  • Give two examples of condensation.
  • Condensation occurs on the (outside/ inside) surface of the lid of hot tea. Where do the liquid come from?
    inside/ from the steam of the hot tea
  • Water droplets falling down on the earth from the cloud is called _______.
    precipitation
  • Condensation occurs on the (outside/ inside) surface of the cold drink. Where do the liquid come from?
    outside/ from the water vapour in the air
  • When oxygen dissolve in the drink, what are the solute and the solvent?
    The solute is oxygen and the solvent is water
  • The temperature at which a solid changes into a liquid is called __________.
    melting point
  • Water from the river, lake or stream entering to the ocean is called ______.
    collection
  • Water from the lake or river turning to water vapour in the air is called _______.
    evaporation
  • The temperature at which a liquid changes into a gas is called __________.
    boiling point
  • When the solute dissolves in the solvent, the solution become _______ appearance.
    uniform
  • When salt is added to the water, the boiling point will be (lower/ higher).
    higher
  • When salt is added to the water, the melting point will be (lower/ higher).
    lower
  • The instrument we use to measure temperature is called _______.
    thermometer
  • You feel cool down when your sweat (evaporate/ condense).
    evaporate
  • Give two insoluble pollutants of water?
  • The change of water vapour into water droplets in the cloud is called _______.
    condensation