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The Atmosphere

Earth's atmosphere is a crucial layer of gases, primarily nitrogen and oxygen, enveloping our planet. It consists of several distinct layers, each with unique characteristics and functions. The troposphere is where life exists and weather occurs, while the stratosphere contains the ozone layer, protecting us from harmful UV radiation. The mesosphere sees meteors burning up, and the thermosphere is where temperatures rise significantly due to solar radiation. Finally, the exosphere is the outermost layer, where the atmosphere thins out into space.

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The Atmosphere

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  1. The Atmosphere

  2. Definition The layer of gases surrounding Earth; composed mainly of nitrogen and oxygen

  3. Layers http://www.fi.edu/wright/again/wings.avkids.com/wings.avkids.com/Book/Atmosphere/Images/atmos_layers.gif

  4. Troposphere • This is where all plants and animals live and breathe • Where weather takes place • Temperature decreases as altitude increases http://atschool.eduweb.co.uk/kingworc/departments/geography/nottingham/atmosphere/pages/gfx/troposphere.jpg

  5. Stratosphere • Ozone in this layer stops many of the sun's harmful rays from reaching the earth • People can not breathe in this layer. • Temperature increases as altitude increases

  6. Ozone Layer • Pale blue gas with a strong odor. • 90% of all ozone is found in the stratosphere • 10% is found in the troposphere • Ozone is extremely important because it is the only gas that absorbs ultraviolet radiation from the Sun and protects the surface of the Earth and people from the damaging effects of UV rays http://ess.geology.ufl.edu/ess/Notes/090-Ozone_Depletion/depl2.jpg

  7. Mesosphere • Temperature decreases as altitude increases • This is where we see "falling stars" – meteors burning up as they fall to Earth

  8. Thermosphere • Layer of the atmosphere which is first exposed to the Sun's radiation and so is first heated by the Sun. • The air is very thin • The temperature dependent on solar activity.

  9. http://science-education.pppl.gov/SummerInst/aurora%20borealis.jpghttp://science-education.pppl.gov/SummerInst/aurora%20borealis.jpg

  10. Exosphere • Highest layer of the atmosphere. The air is very thin here • Atoms and molecules escape into space

  11. Let’s look at an animation: http://earthguide.ucsd.edu/earthguide/diagrams/atmosphere/index.html

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