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eraser
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gift
Win 25 points!
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gift
Win 15 points!
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lifesaver
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15
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How many % of the atmosphere is Nitrogen?
78%
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20
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In wich layer are the radio waves?
It's in the thermosphere.
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20
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With which gas N02 and S02 mixes with to make acid?
With H2O (water vapour)
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20
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Can you tell me 2 greenhouuse gases?
Methane (CH4), carbon dioxide (CO2), water vapour (H2O)
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15
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In which process carbon dioxide is transformed into oxygen?
In photosynthesis
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thief
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25
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magnet
Take 20 points!
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fairy
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banana
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10
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Which pollutants don't have reaction, physical or chemical?
Chemical pollutants
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10
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What type of shape have matter on gaseous state, variable or fixed?
A variable shape
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20
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What is the dew?
Is the condenstion of water vapour on surfaces (normally at night).
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