The atmosphere provides many important functions for Earth.
Talks about the composition of Earth's atmosphere, how it protects life on Earth, and how it is interconnected with the Earth system.
Reviews the roles played by the atmosphere on Earth.
Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.
The use CFCs and other ozone depleting chemicals has been reduced. The ozone hole is starting to recover and may be healed by 2070.