jacqulina thompson solar system vocabulary Flashcards

Terms Definitions
geocentric
a model of he universe of which Earth is at the center of the revolving planets and stars
heliocentric
a model of the solar system in which Earth and the other planets revolve around the Sun
ellipse
an oval shape, which elongated or nearly circular. the shape of the planets orbits.
inertia
the tendency of an object to resist a change in motion
gravity
a force that moves rocks and other materials downhill; the force that pulls objects toward each other
terrestrial planets
the name often given to the four inner planets :mercury, Venus, earth.
,and mars
retrograde rotation
the direction opposite of the movement of something else, and is the contrary of direct or prograde motion
greenhouse effect
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 the trapping of heat by a planets atmosphere
gas giant
the process in which heat is trapped in the atmosphere by water vapor. carbon, dioxide, methane and other gases that form a blanket around earth. the trapping of heat by a planets atmosphere
comet
the name often given to the first four outer planets, Jupiter, Saturn, Uranus and Neptune
asteroid
rocky objects revolving around the sunhat are too small and numerous to be considered planets
asteroid belt
the region of the solar system between the orbits of mars and Jupiter where many asteroids are found
meteoroid
a chuck of rock or dust in space
meteor
a streak of light in the sky produced by the burning meteoroid in the earth's atmosphere
meteorite
a meteoroid that passes through the atmosphere and hits the earth's surface
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