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Unformatted text preview: Chapter 16 Homework Review Questions: 1. What produced the helium now present in the sun's atmosphere? in Jupiter's atmosphere? in the sun's core? Helium in the sun's atmosphere is produced by sun's nuclear fusion. Helium in the sun's core and Jupiter is produced after a few minutes of the big bang. 2. What produced the iron in Earth's core and the heavier elements like gold and silver in earth's crust? Elements heaver than iron are produced by rapid nuclear reactions occurred in explosions of some massive stars. 5. Why does the solar nebula theory predict that planetary system are common? Because if solar nebula theory is correct, then planets are formed as by-products of star formations. Therefor, planets should, mostly, formed from nebulas around proto-stars. 6. Why do we think the solar system formed about 4.6 billion years ago?...
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- Summer '97
- Solar System, Planet, SOLAR NEBULA THEORY