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Evan Worthington

science

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Across
2.an extreme altitude condition
3.natural things that regenerate like trees, wind, water
5.when condensation is present we know this is in air
9.3rd layer of atmosphere and coldest
10.4th main gas in atmosphere
13.amount of people in one area demading more resources
15.rain that contains more acid than other
16.what humans exhale for plants to use for food
20.2nd layer of atmosphere that airplanes travel through to avoid turbulance
22.what plants give off
23.1st layer of atmosphere that we live in
25.the most abundant gas in atmosphere
Down
1.CFC
4.envelope of gases that surrounds earth
6.protective layer from suns powerful rays
7.4th layer of atmosphere divided into 2 layers
8.conditions in the atmsophere at certain time and place
11.matter that an object contains
12.column of air on an object
14.burning that produces smog and acid rain
17.harmful substances to air, water and soil
18.2nd layer of thermosphere from 400km to 600km
19.1st layer of thermosphere where Northern lights take place
21.combination of air water and light
24.combination of smoke and fog

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