Chapter 1. Earth's Atmosphere

Which portion of Earth's atmosphere protects us from ultraviolet radiation?

Click on the correct section of the atmosphere for credit.

{"title":"selection","description":"The stratosphere contains the ozone layer, which protects us from the Sun's harmful UV radiation.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"rect\",\"coords\":\"58,236,499,305\"}]"}

Which portion of Earth's atmosphere contains clouds, storms and almost all other forms of weather?

Click on the correct section of the atmosphere for credit.

{"title":"selection","description":"The troposphere contains most of Earth's air and water, and virtual all of our weather.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"rect\",\"coords\":\"58,306,499,340\"}]"}

Which portion of Earth's atmosphere reflects radio waves back to the Earth's surface?

Click on the correct section of the atmosphere for credit.

{"title":"selection","description":"The ionosphere, also called the thermosphere, reflects radio waves back to Earth. This feature of the atmosphere makes AM/FM broadcasts possible.","type":"correct","color":"#ffffff","code":"[{\"shape\":\"rect\",\"coords\":\"57,17,498,170\"}]"}

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