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27 Cards in this Set
- Front
- Back
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Star
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A large, luminous ball of gas that is held together by its own gravity.
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Universe
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All that exists.
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Galaxy
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One of the vast numbers of systems containing stars, nebulae, star clusters and space debris that make up the universe.
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Milky Way
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our galaxy
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Light Year
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the distance light travels in a vacuum in one year, approximately 5.88 trillion miles
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satellite
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A man made object or vehicle made to orbit the earth; a celestial body orbiting another of larger size
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solar system
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the sun and everything that orbits around the sun
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orbit
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The path taken by a body in space as it moves around its center of attraction.
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revolution
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a complete turn around an axis or point.
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circle of illumination
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the zone of transition between light and dark around a sphere
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centrifugal force
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the force that pushes objects in a curved motion away from the center of the curve
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axis
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an imaginary pole that passes through the earth, connecting the North and South Poles
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terrestrial planets
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planets composed of rock material similar to Earth's.
Mercury, Venus, Earth, and Mars |
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Jovian planets
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planets composed of frozen gases.
Jupiter, Saturn, Uranus and Neptune |
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asteriod
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a celestial body that is a few feet to several hundred miles across and has a distinct orbit
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continent
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one of the seven principle land masses on earth
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island
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any land mass smaller than a continent that is completely surrounded by water
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cardinal directions
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the four primary directions
North, South, East, and West |
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intermediate directions
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the four directions that fall between the primary directions:
Northeast, Southeast, Southeast and Northwest |
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compass rose
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a diagram that show the directions in relation to eath other
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relative location
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where something is in relation to another object
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plates
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huge rigid slabs of crust
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compass
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an instrument with a magnetic needle that spins to align itself with the earth's magnetic poles
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ocean
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the body of salt water that covers over 70% of the earth's surface and is divided into five primary oceans
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sea
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a body of water smaller than an ocean
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salinity
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amount of salt contained in a solution
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oceanographer
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one who studies the oceans
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