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Chapter 12 Vocab
| Question | Answer |
|---|---|
| System | A portion of the universe and all of its components processes and interactions |
| Solar System | System of nine planets including Earth and other objects that revolve around the sun |
| Space Probe | An instrument that is sent to space to gather information and send it back to Earth |
| Mercury | Smallest planet closest to the sun does not have a ture atmosphere has a surface with many craters and high cliffs |
| Venus | Second planet from the sun similar to Earth in mass and size has a thick atmosphere and a surface with craters fault like cracks and volcanoes |
| Mars | 4th planet from the sun has polar ice caps a thin atmosphere and a reddish appearance caused by iron oxide in weathered rocks and soil |
| Moon | A natural satellite of a planet that is held in its orbit around the planet by the planets gracitational pull |
| Jupiter | Largest and 5th planet from the sun contains more mass than all other planets combined has continuous storms of high pressure gas and an atmosphere mostly of hydrogen and helium |
| Saturn | 2nd largest planet and 6th planet from the sun has a complex ring system at least 31 moons and a think atmosphere made from mostly hydrogen and helium |
| Great Red Spot | Giant high pressure storm in Jupiters atmosphere |
| Uranus | 7th planet from the sun is large and gaseous has a distint bluish green color and rotates on an axis nearly parallet to the plane of its orbit |
| Neptune | Usually the eight planet from the sun is large and gaseous has rings that vary in thickness and is bluish green in color |
| Pluto | Considered to be the 9th planet from the sun has a solid icy rock surface and a single moon |
| Crater | A nearly circular depression in a planet moon or asteroid that formed when an object from space hit its surface |
| Earth | 3rd planet from the sun has an atmosphere that projects life and surface temperatures that allow water to exist as a solid liquid and gas |
| Comet | Space object made of dust and rock particles mixed with frozen water methan and ammonia that forms a bright coma as it approaches the sun |
| Meteorite | A meteoroid that strikes the surgace of a moon or a planet |
| Meteor | A meteoroid that burns up in Earths atmospher |
| Asteroid | A piece of rock similar to the material that formed into the planets |
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