Name ______________________________
Watch the video "Planet of Life: The Birth of Earth" and answer the following questions.
1. How many cells make up the human body?
2. What was Earth like 4.6 billion years ago?
3. What formed after the formation of the primordial ocean 3.6 billion years ago?
4. How did the Earth's moon form?
5. How long did it take for primitive amino acids (organic molecules) to form?
6. What sorts of molecules form the froth along an ocean shore?
8. What did bacteria feed on 3.8 billion years ago?
9. Where is Pilbara?
10. _____________________ are sometimes called blue-green algae.
11. How do we know how old the rocks near Pilbara are?
12. What was Dr. Lynn Margulis collecting off the coast of Spain?
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last updated 4-12-2001