First 125 words of the document:
Evidence for plate tectonics
So what was the evidence for Wegener's theory?
1. Plate tectonics explained why earthquakes and volcanoes
were concentrated in specific places - around the boundaries
of moving plates.
2. The match in shape between the east coast of South America
and the west coast of Africa suggests both were once part
of a single continent. There are similar patterns of rocks and
similar fossils on both sides of the Atlantic - including the
fossil remains of land animals that would have been unable to
swim across an ocean.
The animation shows how the original single continent - Pangaea
- is thought to have broken up and drifted apart.