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Cómo estudiar sus tarjetas
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What is the atmoshpere?
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Is a blanket of gases which protects us from the Sun's harmfulrays and stops Earth from getting too cold or too hot. Earth is surrounded by the atmosphere.
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Atmospheric Layers: Exosphere
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10.000 km.
Satellites orbits here. |
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Atmospheric Layers: Thermosphere
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500 km.
Gases in this layer absorb some of the Sun's dangerous UV rays. This make it very hot. 1.500 ºC |
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Atmospheric Layers: Mesosphere
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up to 80 km.
Contains few gases. Very cold here. Meteors orbits here. |
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Atmospheric Layers: Stratosphere
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Up to 50 km.
Contains 19% of atmospheric gases, and also the ozone layer. Very hot here. Planes fly here |
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Atmospheric Layers: Troposphere
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Up to 10 km.
Contains 80% of atmospheric gases. Temperature here gets lower the higher you go. All weather happens here. |
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Atmospheric Gases
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Water: Vapour - Ice crystals - droplets.
Nitrogen: 78% Oxygen: 21% Other gases: 1% |
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Ozone Layer
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Is a gas which exists as a layer in the stratosphere. It absorbs high-energy UV rays from the Sun, this natural shield has been damaged by man-made chemicals called CFCs.
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Greenhouse Gases
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Water vapour
Carbon Dioxide Methane Nitrous Oxide Ozone |
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The greenhouse effect
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Is the way that greenhouse gases help to heat up a planet. It happens on every planet with an atmosphere.
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Global Warming
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When the greenhouse effect gets stronger, global warming takes place. Then, conditions on Earth start to change.
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Air currents
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Air that's warmed by the land or sea begins to rise. As it gets higher, it cools and sinks back to Earth. There,it may be heated again if the land's surface is still warmer than the air itself.
Convection: The circulation of warm and cold air. |
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Air pressure
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Low pressure area: Cyclones
High pressure area: anticyclones. |
