Chapter 9 Homework

Chapter 9 Homework - Chapter 9 Fill In the Blank 1. The...

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Chapter 9 Fill In the Blank 1. The part of the Sun we see is called the photosphere . 3. Below the solar surface, in order of increasing depth, lie the convection zone, the radiation zone, and the core . 4. The solar granulation seen on the surface of the Sun is evidence of convective cells. 5. The Sun appears to have a well-defined edge because the thickness of the photosphere is only 0.1 percent of the solar radius. 6. Hydrogen is the most abundant element in the Sun. 7. Helium is the second most abundant element in the Sun. 8. The two most abundant elements in the Sun make up about 99 percent of its composition. 9. The solar wind is formed as the hot outer regions of the corona expand into interplanetary space. 10. Sunspots appear dark because they are cooler than the surrounding gas of the photosphere. 11. The sunspot cycle is 11 years long; the solar cycle is twice as long. 12. A flare is a violent explosive event in a solar active region. 15. The solar neutrino problem is the fact that astronomers observe too
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This homework help was uploaded on 04/02/2008 for the course ASTR 101 taught by Professor Caffo during the Fall '06 term at New Mexico.

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Chapter 9 Homework - Chapter 9 Fill In the Blank 1. The...

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