Review Sheet for Solar System Test

Review sheet for Solar System Test: 1. What is the model in which Earth is at the center of the system of planets? GEOCENTRIC 2. Who explained that the sun is at the center of the system of planets? COPERNICUS 3. What did Galileo observe about Venus? VENUS GOES THROUGH PHASES SIMILAR TO THOSE OF EARTH'S MOON. 4. What are the two factors that combine to keep the planets in orbit? GRAVITY AND INERTIA 5. What is the tendency of a moving object to continue moving in a straight line or a stationary object to remain in place? INERTIA 6. Each planet and its moons form a SYSTEM 7. Scientists believe there is enough fuel in the sun to last for about another 5 BILLION YEARS 8. What layer are you looking at when you look at a photograph of the sun? PHOTOSPHERE 9. The solar wind is a stream of charged particles produced by the sun's CORONA 10. When compared to the gases around them on the sun, sunspots are COOLER 11. What links different parts of sunspot regions? SOLAR PROMINENCES 12. What do all of the inner planets have in common? THEY ARE SMALL AND HAVE ROCKY SURFACES. 13. Why is Earth unique among the planets? IT HAS OCEANS 14. How are Venus and Earth alike? BY ITS SIZE AND DENSITY 15. Why can’t the atmospheres of the gas giant planets escape into space? THE GAS GIANTS HAVE VERY STRONG GRAVITY 16. What do the first four outer planets have in common? THEY ARE MUCH LARGER THAN EARTH AND DO NOT HAVE SOLID SURFACES. 17. What are Saturn's rings are made up mostly of? CHUNKS OF ICE AND ROCK 18. Why is Uranus different from most other planets? IT ROTATES ON ITS SIDE 19. Why is Pluto different from the other outer planets? IT’S SMALL AND HAS A SOLID SURFACE. 20. What shape are the orbits of comets seen from Earth? LONG NARROW ELLIPSES 21. Where do Meteoroids usually come from? COMETS OR ASTERIODS 22. When a meteoroid enters Earth's atmosphere, it produces a streak of light called a? METEOR 23. Give a description of the inner planets: THEY ARE SMALL AND HAVE A ROCKY SURFACE 24. Give a description of the outer planets: THEY ARE LARGE AND HAVE A GASEOUS ATMOSPHERE 25. Pluto has FEWER moons than any other outer planet. 26. What are chunks of ice and dust that can have long elliptical orbits? COMETS 27. Label the layers of the sun:

a. ____CORONA______

b. ___CHROMOSPHERE__

c. ___PHOTOSPHERE___

d. ___SUNSPOTS____

e. ___PROMINENCE____

f. _____CORE______