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ch 20 science

QuestionAnswer
A description of the solar system in which all of the planets revolve around Earth. geocentric
A description of the solar system in which all of the planets revolve around the sun heliocentric
An elongated circle, or oval shape; the shape of the planets' orbits. ellipse
The tendency of a moving object to continue in a straight line or a stationary object to remain in place. inertia
The name given to the four inner planets: Mercury, Venus, Earth, and Mars terrestrial planets
The spinning motion of a planet from east to west, opposite to the direction of rotation of most planets and moons. retrograde rotation
The process by which heat is trapped in the atmosphere by water vapor, carbon dioxide, methane, and other gases that form a “blanket” around Earth. greenhouse effect
The name given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune. gas giant
A ball of ice and dust whose orbit is a long, narrow ellipse. comet
Objects revolving around the sun that are too small and too numerous to be considered planets. asteroid
The region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found. asteroid belt
A chunk of rock or dust in space meteoroid
A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere. meteor
A meteoroid that has hit Earth's surface meteorite
A galaxy shaped like a flattened ball, containing only old stars. elliptical galaxy
A galaxy that does not have a regular shape. irregular galaxy
A galaxy whose arms curve outward in a pinwheel pattern. spiral galaxy
The initial explosion that resulted in the formation and expansion of the universe Big Bang
Created by: AHohm
Popular Earth Science sets

 

 



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