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


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