2. Cratered surface like the moon Rotation - 59 Earth days Revolution – 88 Earth days Magnetic Field Temperature Maximum 427 C Minimum -173 C Atmosphere – H,Na,O

3. Surface of Mercury includes cliffs, basins, plains, craters

4. Earth’s twin Rotation - -243 Earth days Revolution – 224 Earth days Magnetic field Temperature 482 C Atmosphere – CO 2, N

5. Venus Surface Mountains, valleys, basins, craters, volcanoes, rifts Atmosphere – thick clouds with Sulfuric acid droplets

6. The Red Planet ½ the size of Earth Rotation - 25 hours Revolution – 687 Earth days Magnetic field Temperature -140 - 20 C Atmosphere – CO 2, N, Ar, 0

7. Surface includes plains, volcanoes, mountains and evidence of water in the past. Dust storms occur today.

9. Moons of Mars Deimos and Phobos are both very small.

10. Largest planet Rotation – 9.6 hours Revolution – 11.9 years Ring system present Temperature -121 C Atmosphere – H, He Moons - 40

11. The Great Red Spot is a powerful storm system, lightening occurs in the clouds in the atmosphere of the planet.

13. Ice volcanoes occur on the moon.

14. Volcanic eruption is seen.

16. Second largest planet Rotation – 10 hours Revolution –29 years Complex system of rings Temperature -125 C Atmosphere – H, He Moons - 30

17. Ring system

21. Third largest planet Rotation - -17.9 hours Revolution – 84 years Magnetic field Temperature -193 C Atmosphere – H, He, Methane Ring system Moons - 21

23. Ring system composed of ice boulders and dust.

24. Blue color result of methane gas in atmosphere. Rotation – 16 hours Revolution –165 years Temperature -153 to –193 C Atmosphere – H,He, methane Rings present Moons - 8

25. Storms occur in the atmosphere of Neptune. Clouds present.

26. Rings show odd twisted pattern.

28. Smallest planet Rotation - -6 Earth days Revolution –249 years Planet is solid rock Atmosphere – Methane, N Moon - 1

29. Pluto’s orbit takes it inside Neptune’s orbit on occasion making it the eighth planet for a period of time.

30. Meteoroid – small pieces of rock that results from the breakup of comets. Meteor – a meteoroid that enters the Earth’s atmosphere. Meteorite – a meteor that reaches the Earth’s surface.

31. Impact craters on Earth that result from the impact of a meteor.

32. A piece of rock smaller than a planet that orbits the sun, most are between Mars and Jupiter.

34. A mass of frozen gases and rock particles that orbits the sun, often developing a bright tail when it passes near the sun.

35. Diagram of a comet