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AIR AND WIND

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  • How can we feel air. Give one example.
    Blowing air on our hand, riding bicycle etc
  • Wind is both useful and harmful to us
    True or False
  • Vehicles, factories release_______________.
    Smoke
  • What do we call strong wind accompanied by thunder, rain and lightening?
    Storm
  • Where is air?
    All around us
  • Which Instrument is used to check direction of wind?
    Wind vane
  • _____________ are tiny living things that make the air around us dirty.
    germs
  • Tiny particles we see when we allow little sunlight to enter a dark room are______
    dust
  • We should grow more___________ to keep the air fresh and clean
    plants/ trees
  • When you keep glass of water under sun light, what happens to the water after 2 days?
    The water level decreases
  • Heat of sun changes water into
    Water vapour
  • Wind mills are used for ______________
    To generate electricity/ to grind grains/ to draw water from ground
  • We must breathe_________________ air.
    Fresh
  • Gentle wind is ____________
    breeze
  • What happens to wet clothes kept under sunlight?
    Water present in wet clothes get evaporated
  • Plants take up__________________ gas.
    Carbon dioxide
  • Say any 4 uses of wind.
    breathing, sail boat to sail, wind mills to move, kites to fly, dry clothes etc
  • Very strong wind is called as______________
    Gale
  • What does the air contain?
    Water vapour, dust, germs, smoke, gas.
  • Which instrument is used to measure speed of wind?
    Anemometer
  • Who needs air?
    All living things
  • Humans takeup________________ gas.
    Oxygen
  • How does the wind vane work?
    Its fixed on top of building, it moves in direction of wind.
  • How does the air around us gets polluted?
    vehicles, factories, coughing/ sneezing, garbage
  • What is wind?
    Moving air is called as wind
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