Asteroids and Comets
by Nardo, Don
Series:Extreme Threats
Prefer borrowing? Open Library may have a digital copy too.
AR Book Level
9.6
AR Points
3
Word Count
15,287
Interest Level
Middle Grades (MG 4-8)
Genre
Nonfiction
AR Quiz #
140046 EN
About this book
This book explains the threat asteroids and comets pose to Earth, promoting the theory that millions of years ago, a large hunk of debris struck Earth, causing an ice age that wiped out 70 percent of all living things.
