10th form "What Is the Greenhouse Effect?"
1. The atmosphere is a blanket of gases ____ the Earth.
2. For thousands of years these gases ____ our planet's temperature at about 15 degrees above zero.
3. How? ____ trapping some of the sun's heat.
4. But now, _____ pollution, there are more gases in the atmosphere.
5. This means that the Earth _____ hotter.
6. A greenhouse becomes hot ____ some reason.
7. Its glass lets the sun's heat ____ through, then stops some of it.
8. That's why scientists call the problem of earth's _____ temperature "The Greenhouse Effect".
9. Pollution sends four main "greenhouse gases" ____ the atmosphere.
10. These are: carbon dioxide, Methane and Nitrous Oxide which _____ fertilizers and rubbish and others.
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