Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.4
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3176
Points per Word
0.000315
Page Count
32
Points per Page
0.03125
Description
Earth's atmosphere plays a key role in maintaining the health of the planet. It is made of a very thin layer of air, which covers every inch of Earth's surface. Learn about the atmosphere, from its composition to how it affects life on Earth.