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28 Cards in this Set
- Front
- Back
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All of space and all the matter and energy within in
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Universe |
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The study of the overall structure of the universe |
cosmology
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The Earth sat without moving at the center of the universe, while the moon and the planets whirled around it within a revolving globe of stars
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Geocentric Model |
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The Sun lay at the center of the universe, with the Earth and other planets orbiting around it
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Heliocentric Model |
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The attractive force that one mass exerts onto another; the magnitude of the force depends on the size of the objects and the distance between them |
Gravity |
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Substance of the universe that takes up space |
Matter |
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The ability to do work |
Energy |
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An immense ball of incandescent gas that emits intense heat and light
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Star |
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An immense system of hundreds of billions of stars |
Galaxies |
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Our sun and all the materials that orbit it |
Solar System |
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2) It is roughly spherical |
Planet |
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A name for the inner planets closest to the sun (Mercury, Venus, Earth, Mars) |
Terrestrial Planets |
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A name for the outer planets furthest from the sun (Jupiter, Saturn, Uranus, Neptune) |
Giant Planets |
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2) Some are large & spherical while others are irregular |
Moon |
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Disturbances that transmits energy from one point to another in periodic motion
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The distance between successive waves |
Wavelength |
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The number of waves that pass a point in a given time interval |
Frequency |
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The phenomenon in which the frequency of wave energy appears to change when a moving source of wave energy passes an observer |
Doppler Effect |
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2) IF the light moves closer to the source it becomes bluer |
1) Red Shift 2) Blue Shift |
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The theory that the whole universe must be expanding because galaxies in every direction seem to be moving away from us
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Expanding Universe Theory |
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A cataclysmic explosion that scientists suggests represents the formation of the universe |
Big Bang Theory |
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The formation of new nuclei in the first few minutes of time before any stars existed |
Big Bang Nucleosynthesis |
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A cloud of gas or dust in space
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Nebula |
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A nuclear reaction during which the nucleus of a large atom splits to form 2 nuclei of smaller atoms The process also releases neutrons and energy |
Fission |
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The process by which a radioactive atom undergoes fission or releases particles, thereby being transformed into a new element
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Radioactive Decay |
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Atoms that spontaneously undergo radioactive decay
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Radioactive Elements |
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A type of nuclear reaction during which nuclei collide and bond |
Fusion |
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