Earth Science Chapter 29-30 The Universe Notes

Earth Science Chapter 29-30 The Universe Notes - Chapter...

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Chapter 29-30 The Universe Section 1 The Sun 1.) Sun’s gravity holds planets in orbit. 2.) Planet’s orbits and make up is related to distance from sun. 3.) Sun’s energy life Sun’s Body -average star -109 x larger than Earth’s diameter -333000 x mass of Earth - 99.85% of all mass in solar system. 1. Core - H and He - 15 million degrees C -plasma 2. Radiation Layer -heated by core through radiation - 3 million degrees C 3. Convective Layer -energy transformed by convection currents - 1.1 million degrees C 4. Photosphere “sphere of light” - visible surface (like bubbling pots surface) 5500 degrees C -Granules =small bright area =tops of rising columns of gas =darks areas are sinking areas Sun’s Atmosphere 1. Chromosphere - above photosphere - “sphere of color” bright red - 2500 km thick - 100,000 degrees C (hotter!) -only seen during solar eclipse photosphere is blocked -Solar prominences - erupting clouds of gas that fall back to sun Motions & Activities of Sun -energy at Earth now was created at sun’s core about 3000 yrs ago H+H He+ energy (FUSION) -moves slowly to surface and become light
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-8 minutes (light earth) -rotates on its axis (counterclockwise) but not all areas rotate at same speed
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Earth Science Chapter 29-30 The Universe Notes - Chapter...

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