AEA Quiz Questions and Answers
1. what do asteroids and comets have in common?
ANS most are unchanged sincetheir formation in the solar nebula
2. why do asteroids and comets differ in composition
ANS asteroids formed insidethe frost line, while comets formed outside
3. what is the size of the largest asteroid?
ANS 1,000 km
4. the combined mass of all the asteroids in the asteroid belt is
ANS less than thatof any terrestrial planet
5. the large gaps in the asteroid belt (often called Kirkwood gaps) are causedby
ANS orbital resonances with Jupiter
6. if we know the size of an asteroid, we can determine its density by
ANS deter-mining its mass from its gravitational pull on a spacecraft, satellite, or planet
7. why aren't small asteroids spherical in shape
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ANS the strength of gravity on smallasteroids is less than the strength of the rock
8. a typical shooting star in the mentor shower is caused by a entering
Earth;s atmosphere
ANS pea-size particle from an asteroid
9. processed meteorites with high metal content probably are
ANS chunks of alarger asteroid that was shattered by a collision
10. in order to have a comet named after you, you have to
ANS be one of the firstthree discoverers who report it to the International Astronomical
Union (IAU)
11. when do comets generally begin to form a tail?
ANS Inside of Jupiter's orbit
12. why won't pluto collide with neptune?
ANS the two planets have an orbital reso-nance that prevents them from colliding
13. in the asteroid impact theory of the extinction of the dinosaurs some 65 million years
ago the dinosaurs (and over half of all the other species on Earthat that time) died off largely
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