Layers of the atmosphere
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Layers of the Atmosphere. Troposphere. Ranges from 0 km to 12 km Lowest layer of the atmosphere Where we live W here almost all of the Earth’s weather occurs “ Tropo ” means turning or changing; named because conditions are always changing

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Layers of the Atmosphere

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Layers of the atmosphere

Layers of the Atmosphere


Troposphere

Troposphere

  • Ranges from 0 km to 12 km

  • Lowest layer of the atmosphere

  • Where we live

  • Where almost all of the Earth’s weather occurs

  • “Tropo” means turning or changing; named because conditions are always changing

  • Shallowest layer of the atmosphere with almost all of the mass of the entire atmosphere

  • As altitude increases, temperature drops. Why?

  • Because the air gets less dense as altitude increases.


Stratosphere

Stratosphere

  • Ranges from 12 km to 50 km

  • “Strato” means layer or spreading out

  • The ozone layer is located in the upper stratosphere, and it protects the Earth by absorbing and filtering out the sun’s harmful U-V rays.

  • As altitude increases, temperature increases. Why?

  • The upper stratosphere contains the ozone layer which absorbs energy and turns it into heat causing the temperature to be greater in the upper stratosphere.


Mesosphere

Mesosphere

  • Ranges from 50 km to 80 km

  • Middle layer of the atmosphere

  • “Meso” means middle

  • protects the Earth from most meteors

  • As altitude increases, temperature drops. Why?

  • The lower mesosphere is closer to the ozone layer (hot) and the air gets less dense with altitude so it gets colder.


Thermosphere

Thermosphere

  • Ranges from 80 km and beyond

  • very thin air

  • “Thermo” means heat

  • Broken into 2 layers- The Ionosphere and the Exosphere

  • As altitude increases, temperature increases. Why?

  • Although the air is very thin, the molecules are the first to receive energy from the sun, so the molecules are very hot.


Ionosphere

Ionosphere

  • Is the lower portion of the Thermosphere

  • Ranges from 80 km to 550 km

  • where gas molecules become electrically charged particles called ions

  • Radio waves bounce off ions and back to Earth

  • Where the Aurora borealis is found (Northern Lights)


Exosphere

Exosphere

  • Is the outer portion of the Thermosphere

  • Ranges from 550 km to outer space 

  • “Exo” means outer

  • satellites orbit here


Temperature change in the 4 main layers

Temperature Change in the 4 Main Layers


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