| 1) | What are the four important steps in the cold accretion hypothesis for the formation of the earth? |
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| 2) | What event could be used to signal the start of the solar system? |
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| 3) | What happened during the melting and differentiation period of earth history? |
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| | A) When did this happen? |
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| 4) | What is the probable origin of the earth's atmosphere? |
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| | A) When did this happen? |
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| 5) | What is the probable origin of the earth' oceans? |
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| 6) | What were the main components of the earth's atmosphere at 3.8 billion years ago? |
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| 7) | List two things that occured around 3.8 billion years ago that probably helped life form. |
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| 8) | List two possible origins for the building blocks of life. |
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| 9) | Match the following key components of living cells with their general function |
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A. ATP, ADP, AMP
B. proteins
C. Nucleic acids (DNA, RNA)
D. lipids
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1. cell membranes
2. information storage and retrieval
3. energy storage and retrieval
4. cell structures and catalysts
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| 10) | What was the importance of Stanley Miller's experiements in 1953? |
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| 11) | Why do we believe that evaporation may have played a role in the origin of life? |
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| | A) What role did it play? |
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| 12) | Explain the role that clay minerals may have played in developing some of life's important biochemical reactions? |
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| 13) | It is thought that life was only established once on the earth. Why? |
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| 14) | Why is it likely that once life was established, it would be very difficult to repeat the steps that formed life initially? |
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