Summary: You spend 152 days a year asleep. That's a lot of time! Yet what do you actually know about sleep? Find out what sleep really is and why we do it. Discover the different ways that animals and humans sleep and what happens when we are asleep.
Text Type: Expository, Explanation
Theme/Topic: Life Science, Argument, Opinion, and Persuasion
Product Type |
Individual Title |
Weight |
3.2 oz |
Guided Reading Level |
0, P |
Grade Level |
4th Grade |
Page Count |
24 |