- 1. Which is a tool that astronomers use?
A) hammer B) stethaschopenhagen C) moon D) optical telescope
- 2. Which is a tool that astronomers use?
A) steth seeker B) optical probe C) radio telescope D) porsle sight
- 3. The optical teleschope was invented about how long ago?
A) 100 years ago B) 200 years ago C) 400 years ago D) 300 years ago
- 4. A radio teleschope collects what?
A) radio waves B) sound waves C) music D) pictures of outerspace.
- 5. What is something doing when it circles another object? It is.....
A) orbiting B) rotating C) circling D) day
- 6. What is a force that pulls objects to each other?
A) gravity B) solar sytem C) orbit D) rotate
- 7. What is the time that it takes the Earth to circle the sun once?
A) year B) day
- 8. What is the time that it takes the Earth to spin around once?
A) year B) day
- 9. There are _________ planets in the solar system.
A) nine B) 365 days C) 10 (counting the sun) D) eight
- 10. Every time the Earth orbits the sun, one _________ goes by
A) day B) month C) week D) year
 - 11. Which planet is closest to the sun?
A) Mercury B) Earth C) Pluto D) Venus
 - 12. Which planet is the biggest?
A) Jupiter B) Sun C) Earth D) Mercury
- 14. The solar system includes the planets that orbit _______.
A) once a year B) nine planets C) moons D) the sun
- 15. We first landed on the moon in.....
A) We haven't yet. B) 1969 C) 1996 D) 2008
 - 16. How many phases ore there in a moon?
A) 4 B) 10 C) 8
- 17. It takes about one ___________ for the moon to orbit the Earth.
A) 24 hours B) 366 days during a leap year C) week D) month
- 18. When the moon looks like a thick eyelash it is called a _____________ moon.
A) crescent B) full C) Gibbious D) crater
- 19. If Earth were the size of a basketball, the moon would be about the size of a ________________.
A) balloon B) tennis ball C) soccerball D) pinpong ball
- 20. The most common landforms on the moon are__________.
A) rocks B) mountians C) lakes D) craters
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