Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.4
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
2776
Points per Word
0.00018
Description
Have you ever imagined what life is like hundreds of metres below the surface of the Earth? There is no sunlight here, no green plants and no birds. To explore the world of caves you need special equipment including a helmet with a light.