What is the layer of air around the Earth called?
  • trophosphere
  • atmosphere
  • hemisphere
The air is mainly made up of ........
  • nitrogen
  • oxygen
  • carbon dioxide
The force that pulls you back to Earth is called .......
  • activity
  • heaviness
  • gravity
Water that is floating in the air is called .......
  • precipitation
  • water
  • water vapour
Your brain can survive without oxygen for .......
  • 8 minutes
  • 3 minutes
  • 4 minutes
Plants use what gas in photosynthesis?
  • carbon dioxide
  • oxygen
  • helium
What gas do animals use from the air?
  • carbon dioxide
  • oxygen
  • helium
What gas in the air is causing global warming?
  • carbon dioxide
  • oxygen
  • helium
A fire uses which gas to burn?
  • carbon dioxide
  • oxygen
  • helium
What layer protects us from the sun's harmful rays?
  • protection layer
  • ozone layer
  • atmospheric layer
What do we call harmful gases in the air?
  • solution
  • creation
  • pollution
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