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10 Cards in this Set

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