Summary:
- 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?