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5 Written questions

5 Multiple choice questions

  1. water in the form of gas
  2. the layer of gases that surround the planet
  3. the trapping of heat by the gases in the atmosphere
  4. makes up 21% of the gases in dry air
  5. essential to life, plants need it to produce food & animals give it off as a waste product

4 True/False questions

  1. weatherplants & animals take it directly from the air

          

  2. particlestiny solid or liquid parts of smoke, dust, salt and chemicals

          

  3. laboratoriesa place pure air is found

          

  4. oxygennecessary for a fire to burn

          

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