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Card 16
Front
Where do the oceans and atmosphere come from?
Back
Card 17
Front
How old is the oldest zircon grain?
Back
Card 18
Front
How old are the oldest rocks still with us at the surface of the Earth?
Back
Card 19
Front
Name two gases that were abundant in the earliest atmosphere.
Back
Card 20
Front
When was the ‘late heavy bombardment’?
Back
Card 21
Front
How old are the oldest sedimentary rocks?
Back
Card 22
Front
How old is the first proposed evidence for life on Earth?
Back
Card 23
Front
What is a ‘stromatolite’?
Back
Card 24
Front
How old are the oldest fossils of life?
Back
Card 25
Front
Who came up with the theory of continental drift?
Back
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