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19 Cards in this Set
- Front
- Back
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comet
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a small mass of dust and ice that orbits the sun in a long oval shaped pass
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star
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a hugh burning sphere of gas (for example, the sun)
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trace fossil
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a fossil that shows changes that long dead animals made in their surroundings
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mold
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a fossil imprint made by the outside of dead plant or animal
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cast
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a fossil formed when sediments or minerals fill a mold - it takes on the same outside shape as the living thing that shaped the mold
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astroids
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a small rocky object that moves around the sun
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inner planets
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the planets closest to the sun - mercury, venus, earth, mars
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orbit
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the path that an object such as a planet makes as it revolves around a second object
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solar system
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a group of objects in space that move around a central star
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space probe
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a space vehicle that carries cameras, instruments, and other research tools
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planet
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a large object that moves around a star
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outer planets
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the planets farthest from the sun - jupiter, saturn, uranus, neptune and pluo
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gas giants
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the planets jupiter, saturn, uranus, and neptune -- which are large spheres made up mostly of gasses
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constellation
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the pattern formed by a group of stars in the sky
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telescope
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a device people use to observe distant objects with their eyes
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axis
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an imaginary line which runs through both poles of a planet
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moon
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a natural satellite that moves around a planet
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imprint
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the impression that is left on a soft surface when something is pressed down into it
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space stations
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a station in orbit in space where astronauts and scientists work doing experiments to see how space affects things and people
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