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More cards in this set
Card 6
Front
What is the Earth's crust and upper part of the mantle cracked into?
Back
Card 7
Front
What causes tectonic plates to move?
Back
Card 8
Front
What was Alfred Wegners idea?
Back
Card 9
Front
Why were Wegner's ideas not accepted for many years?
Back
Card 10
Front
In the first billion years what was the atmosphere like?
Back
Card 11
Front
How did oceans form?
Back
Card 12
Front
What other elements did scientists believe were present int he early atmosphere?
Back
Card 13
Front
What produced the oxygen in the atmosphere?
Back
Card 14
Front
Why are we not sure about how life began?
Back
Card 15
Front
What was the miller-urey experiment
Back
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