|One very important gas is oxygen. It is produced by plants during a process called photosynthesis. In this natural chemical reaction carbon dioxide molecules are combined with water molecules to produce a sugar molecule and oxygen gas.
Look at the reaction of photosynthesis. Explain how we could not survive without massive forests on Earth.
Explain how we are creating a very dangerous situation when we cut down forests and increase the amount of cars on our roads. Hint - look at the products formed when petrol burns with oxygen..
We pour water onto fire to extinguish it. How does the water put out the fire?
Run the movie of oxygen supporting
combustion.. Why is oxygen necessary for fuels to burn?
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