Chapter 5 - Changes over Time
Unit C - Earth and Its Resources
- Chapter 5 - Changes over Time
What forces have shaped Earth's landscape?
Piece together what Earth may have looked like approximately 220 million years ago when there was a single supercontinent, Pangaea.
Three of the most catastrophic volcanic eruptions in geologic history occurred at a place now visited by nearly four million people a year: Yellowstone National Park. The magma chamber responsible still lies beneath, and continues to steam, heat, and shift the park landscape. Science Bulletins talks with the geologists regularly monitoring these disquieting signals to understand where this active region lies in its volcanic life span.
Young Naturalist Awards Essay
This 10th-grader from New York reflects on how the colliding of continental plates and the force of glaciers helped shape the "mysterious and majestic" Palisades.
The history of life on Earth is recorded in the planet's rock layers. Try your hand at reconstructing geologic history with this fossil-filled puzzle.
Online Resource, Article
This geologist made not one but two major contributions to our understanding of how the Earth works. Read about his geologic time scale and his contributions to the theory of continental drift.