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ast 6 - Lee Hoeppner Astronomy 100 Homework UNIT 32 RQ 1...

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Lee Hoeppner March 21, 2010 Astronomy 100 Homework UNIT 32 RQ 1. The terrestrial planets are Mercury, Venus, Earth and Mars. They are small rocky planets with relatively thin or no atmospheres, often times called Earth-like planets. The Jovian planets or gas giants are the outer planets consisting of Jupiter, Saturn, Uranus, and Neptune. They have very thick atmospheres and are huge compared with the terrestrial planets. They have no distinct surface and their atmospheres thicken with depth and eventually liquefy under intense pressure. UNIT 33 RQ 3. Condensation occurs when a gas cools and its molecules stick together to form liquid or solid particles. For a planet’s elements to condense, the gas must cool below a critical temperature, the value of which depends on the substance condensing and the surrounding pressure. A planet has to reach a certain temperature for a substance to change from a gas to a liquid. Each element differs at what temperature must be present for it to occur.
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