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Earth Science: Essential Terms 2

Earth Science: Essential Terms 2

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Tags: science   earth science   high school   ngss   terms   ess  

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star
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hot, gaseous, self-luminous celestial body
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nuclear fusion
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a reaction in which two nuclei form a heavier nucleus with the release of energy
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elements
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basic substances composed of atoms of one kind that can't be separated by ordinary chemical means
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universe
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all matter and energy, including earth, galaxies, and intergalactic space
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asteroids
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small celestial bodies that orbit the sun, between Mars and Jupiter
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comets
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celestial bodies orbiting the sun; solid nucleus vaporizes into luminous tail
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galaxy
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a vast star system held together by gravity
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star formation
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process by which dense regions in molecular clouds collapse to form stars
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evidence
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information supporting whether a belief is valid
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moon
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earth's natural satellite
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phenomena
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observed situations whose causes are in question
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day
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a unit of 24 hours corresponding to a rotation of earth on its axis
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