By Beth Geiger
Geologic Time: Earth’s Remarkable Past uses real-world experiences to guide students to an understanding of our planet’s vast history. Students learn that Earth’s
past spans 4.6 billion years. They discover how scientists use relative age dating,
absolute age dating, and fossils to determine the ages and geologic history
of rock layers. Students are introduced to the Geologic Time Scale, the special
calendar that separates Earth’s long history into manageable time divisions
based on important events, such as mass extinctions. At the end of each
two-page spread, a brief statement called The Bottom Line reinforces students’
understanding by summing up the key ideas about geologic time covered
in those pages.
Lexile: 810L
ISBN: 978-1-933798-22-3
