Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
4.9
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1582
Points per Word
0.000316
Description
There are nearly 4,000 different kinds of mammals on Earth. They can be found in almost every environment from the desert to the ocean. There are a few important features that all mammals share, but they also have many differences.