Chapter 5 - Our Dynamic Earth
From slow creeping continents to ground-splitting quakes, the Earth is constantly changing. Take a peek at our planet's layers, learn what secrets rocks reveal, and gain a long view of history.
How well grounded is your knowledge of our planet? Test your Earth science knowledge with this interactive quiz. Then, examine your faults—and the rights answers.
Hands-on Activity, Classroom Activity
Give your class a tour of the diverse landscape of your own undersea realm!
A volcanic eruption that could be felt across an ocean, an earthquake that sparked landslides, massive tsunamis, and a volcanic eruption ... Examine the world-changing results of plates on the move.
Want to take a close look at the layers that make up our solid Earth? Cook up a model that's good enough to eat—from the spice drop inner core to the thin chocolate crust.
Piece together what Earth may have looked like approximately 220 million years ago when there was a single supercontinent, Pangaea.
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 scientific data left in the wake of the horrific December 26, 2004 tsunami is proving invaluable to better prepare for future events. Meet the researchers at the crest of this relatively young science. Featured are the geologists, seismologists, and computer modelers of the U.S. Pacific Northwest, an area replete with geological and anthropological evidence of past tsunamis. Learn how the region is preparing for its inevitable next wave.
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.
An in-depth look at the life-giving and finite resource of water.