Layers of the earth's atmosphere
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The document describes the layers of Earth's atmosphere from top to bottom: 1) Thermosphere, Mesosphere, Stratosphere, and Troposphere - the lowest layer where weather occurs and contains 90% of the atmosphere's mass. 2) Stratosphere extends from 10-50km high, temperature increases with altitude and contains the protective ozone layer. 3) Mesosphere extends to 80km high where temperature decreases with increasing altitude and absorbs little UV radiation. 4) Thermosphere extends to 600km high, temperature increases with altitude and readily absorbs solar radiation.
Layers of the earth's atmosphere
- 1. LAYERS OF THE EARTH’S ATMOSPHERE
- 3. Layers of the Earth’s Atmosphere From top to Bottom Thermosphere Mesopause Mesosphere Stratopause Stratosphere Tropopause Troposphere
- 5. TROPOSPHERE • Lowest and thinnest layer — 16 km at equator, 8 km at poles • 90% of the atmosphere’s mass Temperature decreases with altitude — 6°C per kilometer — Top of troposphere averages — –50°C Where weather occurs Boundary between the troposphere, and the stratosphere is called the tropopause
- 6. STRATOSPHERE Extends from 10 km to 50 km above the ground Less dense (less water vapor) Temperature increases with altitude Almost no weather occurrence Contains high level of ozone > ozone layer Upper boundary is called stratopause
- 8. MESOSPHERE Extends to almost 80 km high Gases are less dense. Temperature decreases as altitude increases. Gases in this layer absorb very little UV radiation.
- 9. THERMOSPHERE above the mesosphere and extends to almost 600 km high temperature increases with altitude readily absorbs solar radiation Temperature can go as high as 1,500 °C reflects radio waves
- 10. EXOSPHERE the interface between Earth and space atoms and molecules can escape to space
- 11. Structure of Atmosphere Stratospheric ozone is good ozone — protects Earth from harmful UV radiation — depletion is detrimental to life Tropospheric ozone is bad ozone — In the troposphere, ozone is a pollutant .
- 12. Ozone Depletion main cause is CFC pollution radiation from the sun causes the CFCs to break down releases one chlorine atom Chlorine atom reacts with ozone (O3 ) molecules forming chlorine oxide(ClO) and oxygen gas ( O2).