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23 Cards in this Set
- Front
- Back
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Accretion |
an increase in the mass of a body by accumlation or clumping of smaller particles |
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Big Bang |
The hypothetical event that started the expansion of the universe from a geometric point; the beginning of time |
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Biosynthesis |
The inital fromation of life on Earth |
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Condensation Theory |
Premise that stars and planets accumulate from contracting, accreting clouds of galactic gas, dust, and debris |
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Density |
The mass per unit volume of a substance, usually expressed in grams per cubic centimeter (g/cm^3) |
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Density Stratification |
The formation of layers in a material, with each deeper layer being denser (weighing more per unit of volume) than the layer above |
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Experiment |
Tests that simplify observation in nature or in the laboratory by manipulating or controlling the conditions under which observations are made |
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Galaxy |
A large, rotating aggregation of stars, dust, gas, and other debris held together by gravity. There are perhaps 50 billion galaxies in the universe and 50 billion stars in each galaxy |
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Laws |
A large construct explaining events in nature that have been observed to occus with unvarying uniformity under the same conditions |
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Marine Science |
The process (or result) of applying the scientific method to the ocean, its surroundings, and the life-forms within it; also called oceanography or oceanology |
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Nebula |
Diffuse cloud of dust and gas |
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Ocean |
The great body of saline water that covers 70.78% of the Earth. |
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Oceanography |
The science of the ocean |
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Outgassing |
The volcanic venting of volatile substances |
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Planets |
A smaller, usually nonluminous body orbiting a star |
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Science |
A systematic way of asking questions about the natural world and testing the answers to those questions |
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Solar nebula |
The diffuse cloud of dust and gas from which the solar system originated |
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The Solar System |
The sun together with the planets and other bodies that revolve around it |
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Stars |
A massive sphere of incandescent gases powered by the conversion of hydrogen to helium and other heavier elements |
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Supernova |
The explosive collapse of a massive star |
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Theory |
A general explanation of a characteristic of nature consistently supported by observation or experiment |
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Milky Way Galaxy |
The name of our galaxy; sometimes applied to the field of stars in our home spinal arm, which is correctly called the Orion arm |
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World Ocean |
The great body of saline water that covers 70.78% of Earth's surface |
