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Origin of the Earth
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Lecture 13
3/11/98
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| | Today we start into our review of the history of Life that will occupy the remainder of the course. |
| | We will look at the origins of the earth and its features that may have made it suitable for life. |
| | Earth and the Solar System formed at the same time approximately 4.6 Billion Years ago. |
| | The earth's size and possition made it suitable for life to develop. |
| | Life probably originated around 3.8 billion years ago. |
| The origins of the Universe |
| The origins of the Solar System |
| | coelessing of cold matter into proto-sun and proto-planets |
| | melting and differentiation |
| | Volcanic activity generated a new atmosphere of H20, CO2, methane, N2 |
| | Earths position relative to the sun allowed water to condense to form the oceans. |
| | Earth's size ensured that volcanic activity could continue to the present |
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