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25 Cards in this Set

  • Front
  • Back
A smaller, usually nonluminous body orbiting a star.
An increase in the mass of a body by accumulation or clumping of smaller particles.
The name of our galaxy. Sometimes applied to the field of stars in our home spiral arm, which is correctly called the Orion arm.
Milky Way Galaxy
The hypothetical event that started the expansion of the universe from a geometric point. The beginning of time.
Big bang
The initial formation of life on Earth
A large construct explaining events in nature that have been observed to occur with unvarying uniformity under the same conditions.
A speculation about the natural world that may be verified or disproved by observation and experiment.
Test that simplify observation in nature or in the laboratory by manipulating or controlling the conditions under which observations are made.
The explosive collapse of a massive star.
The formation of layers in a material, with each deeper layer being denser (weighing more per unit of volume) than the layer above.
density stratification
Premise that stars and planets accumulate from contracting, accreting clouds of galactic gas, dust, and debris.
condensation theory
The volcanic venting of volatile substances.
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.
Diffuse cloud of dust and gas.
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.
marine science
The science of the ocean. See also marine science
(1) The great body of saline water that covers 70.78% of the surface of Earth. (2) One of its primary subdivisions, bounded by continents, the equator, and other imaginary lines.
Tightly condensed knot of material that has not yet attained fusion temperature
A systematic way of asking questions about the natural world and testing the answers to those questions.
The sun together with the planets and other bodies that revolve around it.
solar system
The diffuse cloud of dust and gas from which the solar system originated.
solar nebula
The orderly process by which theories explaining the operation of the natural world are verified or rejected.
scientific method
The great body of saline water that covers 70.78% of Earth's surface.
world ocean
A massive sphere of incandescent gases powered by the conversion of hydrogen to helium and other heavier elements.
A general explanation of a characteristic of nature consistently supported by observation or experiment.