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CH 20 Vocab defined

Ch 20 vocab words

QuestionAnswer
Objects revolving around the sun that are too small and too numerous to be considered planets. Asteroid
The region of solar of solar system between the orbit of Mars, and Jupiter where many asteroid are found. Asteroid belt
The initial explosion that resulted in the formation and expansion of the universe. Big bang
A ball of ice and dust whose orbit is usually long narrow ellipse. Comet
A galaxy shaped like a flattened ball containing only old stars. Elliptical galaxy
The name given to the first four outer planets; Jupiter, Saturn, Uranus, and Neptune. Gas giant
A description of the solar system in which the planets revolve around the earth. Geocentric
The attractive force between two object; its magnitude depends on the distance between them. Gravity
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 Green house effect
A description of the solar system in which all of the sun. Heliocentric
The tendency of moving object to continue in a straight line or stationary object to remain in place Inertia
A galaxy that does not have a regular shape. Irregular Galaxy
A chunk of rock or dust in space. Meteoroid
A meteoroid that has hit Earths surface Meteorite
A streak of sunlight in the sky produced by the burning of a meteoroid in the Earths atmosphere. Meteor
The spinning motion of a planet from east to west, opposite to the direction of rotation of most planets and moons. Retrograde rotation
A galaxy whose arms curve out ward in a pin wheel pattern. Spiral galaxy
The name given to the four inner planets; Mecury, Venus, Earth, and Mars. Terrestrial planets
An elongated circle, or oval shape; the shape of the planets orbits. Ellipse
Created by: mike a
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