英语教案-大气层
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Composition of Air
• There are many different types of gasses in the atmosphere
• They include nitrogen, oxygen, argon, carbon dioxide and other noble gasses
THale Waihona Puke Baiduoposphere
• This is the layer that is closest to the surface of the earth
• It’s elevation ranges from 0 to 10 km
Stratosphere
• This layer sits on top of the troposphere
• It’s elevation ranges from 25 to 100 km
Thermosphere
• This is the highest layer of the atmosphere
• It’s height ranges from 100 to 400 km
• This is where most small meteorites burn up and is also the location in the atmosphere that the northern lights occur (aurora borealis)
• It’s elevation ranges from 10 km to around 25 km
• This layer contains the ozone layer, which protects us from harmful sunlight
Mesosphere
• This layer is above the stratosphere
• The gas that is most abundant is nitrogen
英文课件-大气层Atmosphere
The surrounding air of the Earth
Layers of the atmosphere
• There are 4 layers in the atmosphere
• They are the troposphere, mesosphere, thermosphere, and stratosphere