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chapter 2 sec. 1,2,3

science terms

ellipse An elongated circle, or oval shape; the shape of the planets’ orbits.
geocentric a description of the solar systemin which all of the plants revolve around the earth
inertia the tendency of a moving object to continue in a strait line or a stationary object o remain in place
heliocentric a description in which the solar system in which all of the plants revolve around the sun
core the centrel part of the sun, where nuclear fusion occours
nuclear fusion the process by which hydrogen atoms join together to form helium , releasing energy
corona the outer layer of the earths atmosphere
photosphere the inner layaer of the suns atmosphere
chromosphere the middle layer of the suns atmosphere
solar wind a stream of electrically charged particals produced by the suns corona
sunspot a dark area of gas on the sun that is cooler than the surrounding gases
prominence a loop of gas that protudes from the suns surface, linking parts of the sunspot region
solar flare an explosion of hydrogen gas from the suns surface that occour when loops in sunspot regions suddenly contact
greenhouse effect the trapping of heat by a planets atmosphere
terrestrial plants the name given to the four inner planets; mercury, veus, earth, mars
retrograde rotation the spinning motion of a planet from east to west, opposite to the direction of rotation of most planets and moons
Created by: M**M