Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.



No description

Abby Harris

on 28 April 2010

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Atmosphere

The Atmosphere The atmosphere has different layers.
They have different temperatures, densities, and different amounts of gasses Troposphere The layer of the atmosphere that is closest to Earth’s surface.
Clouds, wind, rain, and snow
Densest of the atmospheric layers- all of the layers above are pushing down in the troposhere The troposphere gets cooler
with increasing altitude.
The air is much colder at the top of a mountain than at the bottom. The bottom is warmed by the ground and ocean- solar energy during the day heats the atmosphere by radiation and conduction. Air at higher altitudes is less dense and is not as close to those sources of energy.

Tropopause: area at the top of the tropospher where the temperature stops decreasing.
Like a lid on the tropopause, locks water vapor in the troposphere- clouds, rain, and snow found here.
Stratosphere The layer above the tropopause Gets warmer with increasing altitude
Different from the troposphere in composition, weather, and density.
Water vapor cannot get through the cold tropopause, so there is little present- has few clouds and no storms.
Increase in temperature in the upper stratosphere happens in the ozone layer- it is warmer because it contains ozone (a type of oxygen with 3 oxygen atoms) that absorbs solar radiation, UV rays. The ozone layer shields living things on Earth’s surface from ultraviolet-radiation damage.
The mesosphere and thermosphere Extreme temperatures Temperatures begin to fall as you rise through the mesosphere, like the troposphere. The coldest temperatures, -112 F, in Earth's atmosphere are found here. Mesosphere Thermosphere Temperatures rise again, reaching 1,796 F. The small amount of oxygen heat up as it absorbs solar radiation. Ionosphere When solar energy is absorbed in the lower thermosphere and upper mesosphere, electrically charged ions are formed Without the ionosphere, most radio signals would travel directly into space Electrons in the ionosphere reflect radio waves Auroras take place in the ionosphere. They form when ions from the sun hit atoms and molecules in the ionosphere, emmiting photons. The aurora borealis Changes in the atmosphere Out gassing Early Earth had lots of volcanoes that erupted with not only lava, but a variety of gasses- H2, H2O, CO2, N2, and poisonous NH3, CO, CH4. BUT NOT O2! First life-forms Signle-celles organisms lived in the ocean and were able to photosynthesise by catching some rays and emitting oxygen. Currently, the balance between plants and animals keep the balance of balance in check. hello
Full transcript