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REVISION UNIT

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  • People need air for ..............
    breathing
  • What happens if we mix syrup with water?
    It changes the colour of the water.
  • What is the characteristic of steam?
    Steam is hot and has no shape.
  • What is dirty air called?
    Polluted air
  • What do divers need when they go underwater?
    Air tank
  • What makes sailboat move?
    Wind
  • What action can we do to keep the air clean? Mention 3!
    Walk or ride bike, take the bus, plant more trees.
  • What are the three states of water?
    Ice, water, steam
  • What is the characteristic of ice?
    Ice is cold and hard.
  • What happens when water freezes?
    It turns into ice.
  • How much water should we drink each day?
    8 glasses / 2 liters
  • What can tell us if we are drinking enough water or not?
    The colour of our urine
  • How does the water taste if we mix it with salt?
    It tastes salty.
  • What happens if you mix oil and water?
    The oil floats on water
  • What should we do to prevent dirty air from getting into our lungs?
    Wear air masks
  • Mention 3 activities that need to use water!
    Bathing, washing, cooking, watering plants, drinking, etc.
  • What happens when ice melts?
    It turns to water.
  • Mention 2 things that need to be filled with air to work!
    ---
  • What makes the air polluted?
    Smoke and dust from cars and factories
  • Why do candles need air?
    For burning
  • What are the characteristics of the three forms of water?
    All forms of water has no colour, no smell, no taste.
  • What happens if we mix sand with water?
    The sand sinks in water.
  • What happens if you mix salt with water?
    The salt disappears in water.
  • What is the characteristic of water?
    Water takes the shapes of its container.
  • Mention three things that need wind to move!
    Sailboat, windmill, kite
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