Layers of the atmosphere
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Layers of the Atmosphere. Layers. The four main layers are called the troposphere, the stratosphere, the mesosphere, and the thermosphere The four main layers are classified according to temperature. The Troposphere. The lowest layer of the Earth’s atmosphere (where we live)

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Layers
Layers

  • The four main layers are called the troposphere, the stratosphere, the mesosphere, and the thermosphere

  • The four main layers are classified according to temperature


The troposphere
The Troposphere

  • The lowest layer of the Earth’s atmosphere (where we live)

  • Where the Earth’s weather occurs

  • 0-12 km in the atmosphere

  • About 1 km = 6.5 Celsius degrees cooler

  • At the tops of the troposhere it is about -60 degrees Celcius (-76 ⁰F)


The stratosphere
The Stratosphere

  • 12-50 km in atmosphere

  • Upper stratosphere is warmer than lower stratosphere because it contains a layer of ozone

  • Ozone absorbs energy from sun and converts to heat


The mesosphere
The Mesosphere

  • 50-80 km in atmosphere

  • As altitude increase, temperature decreases (upper mesosphere is -90 ⁰C or -130⁰F)

  • This is where you see shooting stars (mesosphere protects Earth from being hit)

  • Little change to environment


The thermosphere
The Thermosphere

  • No define outer limit- runs into outer space

  • As altitude increases, temperature increases to 1800 degrees Celsius (3272 ⁰F)

  • Why is the thermosphere so hot?

    • Energy coming from sun strikes thermosphere first.

  • Little change to environment


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