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15 Cards in this Set
- Front
- Back
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Nebular Hypothesis |
the theory that the solar and stellar systems were developed from a primeval nebula. |
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Big Bang |
the rapid expansion of matter from a state of extremely high density and temperature that according to current cosmological theories marked the origin of the universe. |
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Universe |
all existing matter and space considered as a whole. |
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Galaxy |
a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. |
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Hydrologic Cycle |
a conceptual model that describes the storage and movement of water between the biosphere, atmosphere, lithosphere, and the hydrosphere. |
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Evaporation |
The changing of a liquid into a gas, often under the influence of heat (as in the boiling of water). |
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Transpiration |
the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. |
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Precipitation |
rain, snow, sleet, or hail that falls to the ground. |
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Runoff |
the draining away of water (or substances carried in it) from the surface of an area of land, a building or structure, etc. |
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Groundwater |
water held underground in the soil or in pores and crevices in rock. |
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Fossil |
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. |
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Body Fossil |
A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded and preserved in the earth's crust. |
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Trace Fossil |
a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself. |
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Unaltered Fossil |
This does not mean the organism is unchanged, but that the original material of the organism has not been changed to another substance. |
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Altered Fossil |
has had the orginial material replaced by another substance. |
