Question | Answer |
geocentric | A description of the solar system in which all of the planets revolve around the earth. |
heliocentric | A description of the solar system in which all of the planets revolve around the sun. |
ellipse | An elongated circle, or oval shape; theshape of the planets' orit |
inertia | The tendacy of a moving object to continue in a straight line or a stationary object to reamain in place. |
nuclear fusion | The process by which hydrogen atoms join together to make helium;; making energy. |
core | The central part of the sun where, nuclear fusion occcurs. |
photosphere | The inner layer of the suns atmosphere. |
chromospheres | The middle layer of the suns atmosphere. |
corona | The outer layer of the suns atmoshpere. |
solar wind | A stream of elictrically charged particles produced by the suns corona. |
sunspots | A dark area of gas on the sun that is cooler than surrounding gases. |
prominence | A loop of gas that protrudes |
solar flare | An explosion of Hydrogen gas from the suns surface that occurs when loop in sunspots region suddenly connect. |
gas giant | The name given to the first four outer planets |
comet | A ball of ice and dust whose orbit is usually a long narrow ellipse. |
asteroid | Objects revolving around the sun that are too small and too numerous to be considered planets |
asteroid belt | The region of the solar system between th eorbits of mars and jupiter, where many asteroids are found. |
meteroid | A chunck of rock or dust in space. |
meteor | A streak of light in the sky produced by the burnig of a meteroid in earths atmoshpere. |
meteorite | A meteroid that has hit the earths surface. |
extraterrestrial life | Life that rises outside the earth. |
terrestrial planet | The name given to four inner planets. |
retrograde rotation | The spinning motion of a planet from east to west, opposite of the direction of the rotation of most planets and moons. |
greenhouse effect | The trapping of heat by the planets atmosphere. |