the Atmosphere

• What is the layer of air surrounding the Earth called?

  The atmosphere
• What is the atmosphere composed of?


  A mixture of different gases
• Which gases make up most of the atmosphere?

  Nitrogen and oxygen
• What are some other gases present in the atmosphere?

  Carbon dioxide and water vapour
• Why are the different gases in the atmosphere important?


  They are essential for the survival of living things
• What do living things need to stay alive?

  Oxygen
• What do plants need to make their own food?

  Carbon dioxide
• What are the key terms related to the atmosphere in this study material?

  • Surrounded
  • Layer
  • Mixture