2. 1. L ist the 9 planets in our solar system. Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto (dwarf planet)

3. 2. List each planet and the main facts about each.

4. Mercury 2 nd smallest planet no atmosphere craters smooth terrain deep slopes 1 rotation = 59 days Temp: 800 F to -279 F

5. Venus Orbits sun every 255 days Thick clouds Volcanic activity Tectonic activity 80% plains covered by volcanic flows Temp: 887 F Atmosphere is 97% CO2

6. Earth

7. Mars The red planet White polar caps Large dust storms Hurricane force winds Large volcanoes Large canyons Temp: - 94 F to – 148 F

8. Jupiter largest planet 1 rotation = 10 hours great red spot – a cyclonic storm hydrogen-helium atmosphere winds cause light and dark bands immense gravity gigantic ocean of liquid hydrogen 28 moons

9. Saturn 29.46 years to make one revolution around the sun Rings made of ice and rock particles Winds up to 637.5 mph Large cyclonic storms 31 moons

10. Uranus Rotates on its side Has rings Takes 84.01 years to make one revolution around the sun

11. Neptune Winds up to 625 mph Great dark spot – a large rotating storm 13 moons

12. Pluto 248 years to orbit the sun classified as a dwarf planet Average temp: 346 F Dirty ice ball

13. 3. L ist the terrestrial planets. Mercury Venus Earth Mars

14. 4. What does the term, “terrestrial” mean? Earth-like

15. 5.List the jovian planets. Jupiter Saturn Uranus Neptune

16. 6.What does the term, “jovian” mean? Jupiter-like

17. 7. What are the terrestrial planets made of? Rocky and metallic substances

18. 8. What are the jovian planets made of? Gases – hydrogen and helium Ice

19. 9. Nebula Cloud of dust and gas in space

20. 10.What is the nebular theory? The sun and planets formed from a rotating disk of dust and gases

21. Nebular Theory

22. 11.Planetesimals Small, irregular shaped bodies resulting from colliding bits of matter.

23. Planetesimals

24. 12.How did the distance from the sun affect the creation of planets? Planets closer to the sun formed from materials with higher melting points – metals and silicate minerals. Planets further from the sun formed with solid materials and ices.

25. 13.Asteroid Small rocky bodies

26. 14.Comet Pieces of rocky and metallic materials

27. 15.Coma The glowing head on a comet

28. 16.Meteoroid A small solid particle traveling through space.

29. 17.When is a meteoroid called a shooting star? When it enters the earth’s atmosphere.

30. 18.Meteor A meteoroid that does not enter the earth’s atmosphere.

31. 19.Meteorite A meteoroid that reaches the earth’s surface.