Air

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Air

  1. 1. Air is all around us and we can’t see it. Air is a mixture of gases, but it consists mainly of oxygen and nitrogen.
  2. 2. Air and water have the same characteristics; they have no smell, no taste and no colour.
  3. 3. Wind is moving air. Hot air goes up and cold air goes down.
  4. 4. The difference in air temperature causes wind, which moves air from one place to another. This is why clouds move.
  5. 5. A little wind is called a breeze. A breeze moves the leaves on the trees. It can help us feel cooler on a hot day. There are different types of wind. When there is no wind or we can’t feel it we say it is calm.
  6. 6. A gale is a strong wind. A gale moves the branches on trees and can sometimes blow trees down. A hurricane is a very strong wind. A hurricane can destroy houses and other buildings.
  7. 7. We can measure how fast the wind is moving with an anemometer. We can find out the direction the wind is blowing with a weather vane.

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