Chapter 25 Slides Sections 1-3
Chapter 25 Slides Sections 1-3
Chapter 25 Slides Sections 1-3
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AP Biology<br />
Synthesis of Organic Compounds on<br />
Early Earth<br />
• Earth formed about 4.6 billion years ago, along<br />
with the rest of the solar system<br />
• Bombardment of Earth by rocks and ice likely<br />
vaporized water and prevented seas from<br />
forming before 4.2 to 3.9 billion years ago<br />
• Earth’s early atmosphere likely contained<br />
water vapor and chemicals released by<br />
volcanic eruptions (nitrogen, nitrogen oxides,<br />
carbon dioxide, methane, ammonia, hydrogen,<br />
hydrogen sulfide)<br />
© 2011 Pearson Education, Inc.
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