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18 Cards in this Set
- Front
- Back
Satellites
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a body in space that revolves around another, larger body; our moon is a satellite
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Rotation
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a body in space spinning on its imaginary axis
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Revolution
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the movement of an object in space on a path, called an orbit, around another body.
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Solar System
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the collection of nine planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
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Sun
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the average size star around which the earth orbits.
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Asteroids
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fragements of rock which orbit the sun in the asteroid belt; believe to be left over from the formation of our solar system
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Comets
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a large ball of ice, dust, & gases which orbit the sun way beyond the orbit of Pluto
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Meteroids
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Asteroids which travel through earth’s atmosphere, burning up and creating a “shooting star”; a meteorite is a meteroid which lands on earth
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Gravity
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a force that pulls everything toward the center of the planet
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Spring Scale
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measures weight in Newtons
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Gravitational Force
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a pulling force
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Mass
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-the amount of matter that makes up an object (always stays the same)
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Weight
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the pull of gravity on an object
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Triple Beam Balance
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measures mass in grams
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Models
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used to study something that is too large or too small to observe directly
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Astronaut
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A person trained to pilot, navigate, or otherwise participate as a crew member of a spacecraft
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NASA
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National Aeronautics and Space Administration
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Shuttle
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A reusable spacecraft with wings for controlled descent in the atmosphere, designed to transport astronauts between Earth and Space.
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