World Basics · Physical world
Plate Tectonics & Mountains
The Earth's crust is broken into moving plates. How Wegener's continental drift became plate tectonics, the three kinds of boundaries, and how they build mountains, ocean trenches, volcanoes and earthquakes, including the Ring of Fire.
Step 1 of 6 · Overview30 min read ·
Key idea
Prereqs: Continents & oceans; Climate & biomes. Next: Oceans, currents & weather systems. Follows Crash Course Geography #19–20, Khan Academy 'Plate tectonics' and the USGS's *This Dynamic Earth*.Next: 1. From drift to tectonics