Section 3 (A) Notes

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A scientist noticed that at one time the continents looked as if they could fit together in a single landmass called Pangea.

When continents merged their edges crumbled and formed mountains.

Scientists discovered that in oceans there were valley-like things called trenches and mountains called ridges.

Almost all earthquakes occur around the plate boundaries.

Vocabulary Words

Pangea - when the continents were merged together. This was called Pangea.

Continental drift - this is a theory that the continents have moved apart from each other.