1. What evidence did Alfred Wegener use to support his theory of continental drift? (Points: 1)
Wegener´s only evidence was that coastlines between continents fit together like puzzle pieces.
Coastlines fit together between different continents, and similar rocks and fossils are found on different continents.
Wegener had no evidence, which is why his theory was rejected.
2. In a convection cell, cold dense material rises, while hot, less dense material sinks. (Points: 1)
True
False
3. What is the name for the supercontinent that once formed from all the continents? (Points: 1)
Gondwanaland
Laurasia
Pangaea
4. Plates move on top of which layer of the earth? (Points: 1)
asthenosphere
crust
core
5. What is the source of earth’s internal heat? (Points: 1)
only radioactivity
only heat left from earth´s formation
both radioactivity and heat from
2007-09-24
06:49:41
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5 answers
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asked by
JJ
1