Ever-Changing Earth

The Big Question

Observation vs. Inference

Earth's Surface

A Continental Puzzle

Earthquakes Around the World

Layers of the Earth

Density Lab

Earthquakes

Finding the Epicenter

Volcanoes & Tsunamis

What's Going On Under the Sea

Plate Boundaries

What Force Causes Plate Movement?

Plate Tectonics

Future City Project

Assessments