Pearson 6th Earth Science terms and defintions

1. Ch. 16- The Solar System

3. 1. __________________- Earth-centered geocentric universe

7. 2. __________________- sun-centered (revised by __________) heliocentric universe Copernicus

8. 1st proposed by Greek philosopher, Aristarchus of Samos.

10. 3. ____________- the sun and all of its satellites A. The sun contains _____% of all the mass in our solar system Solar system 99.86

11. B. Johannes ______ discovered that the planets orbit the sun in ________ orbits. Kepler elliptical 1) _________- closest 2) ________- farthest perihelion aphelion

12. 4. ________- an average middle-aged star that shines with yellow light A. ____________- lowest layer of the sun’s atmosphere from which light is given off; surface- 6000 º C. B. _____________- from photosphere to about 2000 km C. ________- above transition zone for millions of kilometers into space; temps to 2,000,000 º C; seen during an aclipse the sun photosphere chromosphere corona

14. E. __________- charged particles that escape from the corona and move through space F. ________- darker , cooler spots on the sun’s surface G. ____________- huge, arching columns of gas H. ___________- violent eruptions from the sun that shoot gases outward at high speed solar wind sunspots prominences solar flares

17. 6. __________- doughnut-shaped region beyond Neptune where comets come from Kuiper belt

18. 7. ___________- a spherical region of comets that surrounds our solar system Oort cloud

19. 8. ___________- fragments in space in no particular orbit meteoroids

20. 9. _________- space fragments that enter our atmosphere and burn up meteors

23. 10. ___________- meteors that hit Earth meteorites

25. 11. _________- particles caught between the inner and outer planets (Mars and Jupiter) asteroids * Ceres is the largest asteroid at 480 miles in diameter.

26. The End