• The atmosphere is a mixture of gases that surrounds the planet.
  • The gases in the atmosphere include nitrogen, oxygen, and carbon dioxide.
  • The atmosphere supports life and is also needed for the water cycle and weather.
  • Gases in the air allow us to hear most of the sounds in our world.
  • Without the atmosphere, the world would be a silent, eerie place.
  • Use the resource below to answer the questions that follow.
  • The questions include: How does the atmosphere keep Earth's temperature moderate?
  • What is the protective layer in the mesosphere?
Select from the frequently asked questions below