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24 Cards in this Set
- Front
- Back
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GEOCENTRIC
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a description of the solar system in which all of the planets revolve around earth.
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HELIOCENTRIC
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a description of the solar system in which all of the planets revolve around the sun.
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ELLIPSE
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an elongated circle or oval shape, the shape of the planets orbits.
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INERTIA
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the tendancy of a moving object to continue in a straight line or a stationery object to remain in place.
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NUCLEAR FUSION
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the combining of two atomic nuclei into a single larger nucleus.
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CORE
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earth's dense center-the central part of the sun where nuclear fusion occurs.
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PHOTOSPHERE
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the inner layer of the sun's atmosphere.
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CHROMOSPHERE
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the middle layer of the sun's atmosphere.
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CORONA
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he outer layer of the sun's atmosphere.
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SOLAR WIND
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a stream of electrically charged particles produced by the sun's corona.
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SUNSPOT
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dark, cooler regions on the surface of the sun.
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PROMINENCE
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a loop of gas that protrudes from the earth's surface, linking parts of sunspot regions.
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SOLAR FLARE
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an explosion of hydrogen gas from the sun's surface that occurs when loops in sunspot regions suddenly connect.
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TERRESTRIAL PLANETS
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the four inner planets-mercury, venus earth, mars
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RETROGRADE ROTATION
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the spinning motion of a planet from east to west opposite to the direction of rotation of most planets and moons.
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GREENHOUSE EFFECT
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the process by which heat is trapped in the atmosphere by water vapor, carbon dioxide, methane, and other gases that form a blanket around the earth.
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GAS GIANT
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the name given to the first four outer planets- jupiter saturn, neptune, uranus.
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COMET
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a ball of ice and dust whose orbit is a long narrow ellipse.
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ASTEROID
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objects revolving around the sun that are too small to be considered planets.
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ASTEROID BELT
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the region of the solar system between the orbits of mars and jupiter where many asteroids are found.
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METEOROID
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a chunk of rock or dust in space.
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METEOR
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a streak of light in the sky produced by the burning of a meteoroid in earth's surface.
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METEORITE
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a meteoroid that has hit earth's surface.
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EXTRATERRESTRIAL LIFE
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life that arises outside of earth.
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