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10 Cards in this Set
- Front
- Back
1. Name 3 reasons the Earth's atmosphere is important to life.
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1. Contains oxygen, carbon dioxide and water necessary for life.
2. Keeps Earth's temperature in a range good for life. 3. Blocks harmful radiation from Sun. |
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2. How did Earth's present atmosphere form?
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While the Earth was forming, erupting volcanoes emitted hot gases that eventually became the atmosphere.
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3. Of what is Earth's atmosphere made?
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78 % is nitrogen
21 % is oxygen 1 % is argon, carbon, and water vapor |
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4. Name the 5 layers of Earth's atmosphere.
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Troposphere
Stratosphere Mesosphere Thermosphere Exosphere |
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5. What phenomenon happens in the ionsphere and what layer is it part of?
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The ionsphere is part of the thermosphere and mesosphere and in this layer is where the aurora occurs.
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6. How does air pressure change as altitude?
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Air pressure decreases with altitude.
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7. How does temperature change as altitude increases?
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In the troposphere, the temperature decreases but in the stratosphere, the temperature increases because of the ozone layer.
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8. How is heat from the sun transferred?
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It is transferred through radiation.
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9. How percentage of the sun's energy gets reflected by clouds, absorbed by the atmosphere and is absorbed by the Earth's surface?
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25% is reflected by clouds
20% is absorbed by the atmosphere 50% is absorbed by Earth's surface. |
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10. Describe the Greenhouse Effect.
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Light entering Earth's atmosphere is trapped by gases and converted in infrared energy which is heat.
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