Practice Quiz

AP Environmental Science

Category - AP Environmental Science

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In which layer of the atmosphere is the ozone layer?
  1. Stratosphere
  2. Exosphere
  3. Thermosphere
  4. Mesosphere
Explanation
Answer: A - The ozone layer is in the stratosphere.

Key Takeaway: Much of the Earth’s ozone is formed in the tropics, where the sun is overhead for the majority of the year. The ozone is then distributed around the earth by wind. Ozone high in the atmosphere-technically in the stratosphere-helps to protect the Earth from the sun’s ultraviolet rays.
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