Human earth shapers/ETHS101/Earthsystems/Atmosphere

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Atmosphere

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Did you know
  • The atmosphere forms a protective blanket around Earth and makes it a habitable planet for life. It is the air we breathe and plays a key role in the weather we all like to complain about.
  • The atmosphere encompass all the gases that swirl around the Earth.
  • The blue colour of the sky is because of dispersion and absorption of the Sun's radiation by molecules in the atmosphere.
  • The red colour in the morning and the evening is because of particles, such as dust, smoke or ash.
The Atmosphere
Image Credit: NASA/GSFC/Reto Stöckli, Nazmi El Saleous, and Marit Jentoft-Nilsen (Public Domain)
Exceptional red sunsets in London,



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How many Atmospheres?

If we told you earth had two atmospheres, would you believe us?

  • Earth has had two atmospheres
    • True
      • Correct. The first was lost when a small planet collided with Earth to form the Moon. The second atmosphere was outgased from the interior of Earth. It was retained by gravity and protected from solar winds by the Earth’s magnetic field.
    • False
      • Incorrect. Had to believe right? Try again and learn why the earth has had two atmospheres.



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