Summary
The ground feels solid, but Bill shows it's a thin, cracked shell riding on hotter rock below. He connects the puzzle-piece plates to where mountains, volcanoes, and earthquakes show up on the map.
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Teaching resources
Discussion questions
Discussion
The ground feels solid, but Bill shows it's a thin, cracked shell riding on hotter rock below.
- What is the crust sitting on top of?
- Why do volcanoes and earthquakes tend to line up in the same places?
- How can land made of solid rock slowly move?
Quick work-a-long
Vocabulary: crust, plate, mantle.
Try it: On a world map, mark three places where plates meet and note what Earth feature you'd expect there.