pluto

11. Pluto is ____ water. A. 1/3 B. 1/4 C. 2/3 D. ¾

A. 1/3

12. Which object's discovery in 2005 pressured astronomers to reclassify Pluto? A. Europa B. Charon C. Eris D. Kuiper

C. Eris

1. Which of the following is not true about Pluto's satellite Charon? A. It has a substantial amount of impact craters B. It is tidally locked with Pluto C. Its orbital period is 6.4 days D. It was discovered in 1978 E. All answers are true

A. It has a substantial amount of impact craters

3. What was the name of the spacecraft that flew by Pluto and provided the newest photographs of the dwarf planet? A. New Horizons B. Calipso C. Skylab D. Explorer-1 E. none of the above

A. New Horizons

10. How many dwarf planets are in our solar system? A. 9 B. 5 C. 3 D. 1

B. 5

13. What are plutoids? A. Pluto's moons B. Icy dwarf planets beyond Neptune C. Pluto's mountains D. Another name for asteroids

B. Icy dwarf planets beyond Neptune

2. What year was it decided that Pluto was a dwarf planet? A. 1995 B. 2001 C. 2006 D. 1985

C. 2006

7. What is Plutos orbital period? A.365 days B. 300 days C. 248 years D. 65 years

C. 248 years

6. Pluto is made up of... A. Gases B. Molten rock C. Ice and rock D. None of the above

C. Ice and rock

8. Pluto is a dwarf planet in which belt? A. Titan B. Kryptic C. Kuiper D. Dilated

C. Kuiper

5. How many known moons does Pluto have? A. 16 B. 1 C. 0 D. 5

D. 5

14. Who discovered Pluto? A. Daniel Marco B. Arthur Smith C. Kent Thompson D. Clyde Tombaugh E. John Turnbull

D. Clyde Tombaugh

15. The average temperature on Pluto is? A. -620 F B. -125 F C. -130 F D.-375 F

D.-375 F

9. How long is Pluto's rotational period (day)? A: 1.7 earth days B: 12.2 earth days C: 4.3 earth days D: 6.4 earth days

D: 6.4 earth days

4. True or False: Pluto is smaller than the Moon.

true