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31 Cards in this Set
- Front
- Back
solar system
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The sun, with the group of celestial bodies which, held by its attraction, revolve round it.
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planet
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Any of the celestial bodies (other than comets or satellites) that revolve around the sun in the solar system
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gravity
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The force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near the surface.
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inertia
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The tendency of a body at rest to remain at rest or of a body in straight line motion to stay in motion in a straight line unless acted on by an outside force.
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lithosphere
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The outer part of the earth, consisting of the crust and upper mantle.
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crust
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Rocky surface that makes up the top of the lithosphere, includes continents and ocean floor.
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hydrosphere
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The water vapor in the earth's atmosphere.
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atmosphere
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Gaseous mass or envelope surrounding the earth.
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constellation
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A cluster of stars
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fault
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A fracture of a rock formation caused by a shifting or dislodging of the earth's crust.
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geologist
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A scientist who studies the earth's crust.
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magma
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Molten rock material under the earth's crust, from which igneous rock is formed by cooling.
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lava
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Molten rock that reaches the earth's surface through a volcano.
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weathering
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Action of the elements on a rock in altering its color, texture, or composition, or in rounding off its edges.
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erosion
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Wearing away of the earth's surface by any natural process.
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deposition
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The natural process of laying down a deposit of something.
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mineral
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A naturally occurring, inorganic solid substance having a chemical composition and characteristic crystalline structure, color and hardness.
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luster
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brightness
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streak
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The fine powder or mark yielded by a mineral when scratched or rubbed against a harder surface.
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hardness
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resistance of a metal or other material to denting, scratching, or bending.
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cleavage
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The state of being split; a fissure or division.
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ore
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metal
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gem
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A precious stone of any kind, such as the ruby, emerald, topaz, sapphire.
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rock
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Any natural deposit forming a part of the earth's crust.
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igneous rock
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Rock formed by the solidification of molten magma sedimentary rock: rock formed from consolidated clay sediments.
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fossil
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The remains of an animal or plant found in solidified rocks.
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metamorphic rock
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Rock altered by pressure and heat.
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humus
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Partially decomposed organic matter.
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meteorite
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Chunk of rock from space that strikes the surface of earth or the moon.
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pollution
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The state of being contaminated with harmful substances.
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rock cycle
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Relationships between igneous, sedimentary, and metamorphic rocks.
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