1. Planet Facts

2. Planet Size

5. Vocabulary Surface Pressure (bars or atmospheres) - This is the atmospheric pressure (the weight of the atmosphere per unit area) at the surface of the planet in bars or atmospheres. Length of Day - The average time compared to Earth for the Sun to move from the noon position in the sky at a point on the equator back to the same position.

6. Mercury  Surface Pressure: 0  Gravity: 3.7  Length of day: 175.9  Diameter: 4879 km  Temperature: 167 C

7. Mercury  Wind Speed: 0  Atmosphere: virtually no atmosphere, however what is there contains hydrogen, oxygen, sodium, potassium and argon.  Water: yes  Other: most iron rich planet in the Solar System

8. Venus  Surface Pressure: 92  Gravity: 8.9  Length of day: 116.8  Diameter: 12,104 km  Temperature : 462 C

9. Venus  Fastest Wind Speed: 1810 km/h  Atmosphere: mostly of carbon dioxide  Water: very little  Other: Billions of years ago, Venus probably had much more water.

10. Earth  Surface Pressure: 1  Gravity: 9.8  Length of day: 1  Diameter: 12,756 km  Temperature: 15 C

11. Earth  Fastest Wind Speed: 371 km/h  Atmosphere: nitrogen and oxygen  Water: yes  Other: contains life

12. Mars  Surface Pressure: 0.01  Gravity: 3.7  Length of day: 1.03  Diameter: 6792 km  Temperature: - 65 C

13. Mars  Fastest Wind Speed: 93.2 km/h  Atmosphere: mostly carbon dioxide  Water: most is frozen  Other: Called the red planet because of the iron oxide on the surface.

14. Jupiter  Surface Pressure: Unknown  Gravity: 23.1  Length of day:.415  Diameter: 142,984 km  Temperature: -110 C

15. Jupiter  Fastest Wind Speed: 620 km/h  Atmosphere: hydrogen  Water: trace amounts  Other: 63 moons

16. Saturn  Surface Pressure: Unknown  Gravity: 9.o  Length of day:.445  Diameter: 120,536 km  Temperature: -140 C

17. Saturn  Fastest Wind Speed : 1,800 km/h  Atmosphere: mostly of hydrogen and helium  Water : trace amounts  Other: The rings are made up of dust, gravel, snow, ice, rocks, boulders.

18. Uranus  Surface Pressure: Unknown  Gravity: 8.7  Length of day: 0.720  Diameter: 51,118 km  Temperature: -195 C

19. Uranus  Wind Speed: 700Km/h  Atmosphere: hydrogen and helium  Water: Yes  Other: 27 moons

20. Neptune  Surface Pressure: Known  Gravity: -11  Length of day: -.673  Diameter: 49,528 km  Temperature: - 200 C

21. Neptune  Wind Speed: 200Km/h  Atmosphere: methane gas  Water: yes  Other: Methane gives Neptune its blue cloud color.