quiz 11 Astronomy

1.
	The orbits of most asteroids Student Response Value Correct Answer A. cross the orbits of all four terrestrial planets. B. lie entirely beyond the orbit of Mars.    C. cross the orbit of Mars.  D. lie beyond Neptune. 0% E. cross the orbit of Earth. Score: 0/1
2.
	What is the typical size of most known asteroids? Student Response Value Correct Answer A. larger than the Moon B. a few meters C. a few hundred kilometers D. larger than the Earth  E. a few kilometers 100%    Score: 1/1
3.
	What is the defining property of the Trojan asteroids? Student Response Value Correct Answer A. Their orbital periods are exactly one year, like ours.  B. They have orbits at the distance of Jupiter and 60 degrees ahead of or behind it. 100%    C. They have orbits between Saturn and Uranus. D. They have orbits that cross the orbit of the Earth, but not that of Venus. E. Like Pluto, they are in a 3:2 resonance with Neptune. Score: 1/1
4.
	The type of asteroid that would be the densest would be type Student Response Value Correct Answer A. Z. B. V. C. C. D. S.  E. M. 100%    Score: 1/1
5.
	The Apollo and Aten asteroids have orbits that Student Response Value Correct Answer A. stay out beyond Neptune.  B. cross the orbit of Earth at perihelion. 100%    C. stay sixty degrees ahead of or behind Jupiter. D. cross the orbit of Mars, but not the Earth, at perihelion. E. remain between Mars and Jupiter, in the main belt. Score: 1/1
6.
	Which of the following objects never collide with the Earth? Student Response Value Correct Answer A. Aten asteroids B. short period comets C. Apollo asteroids D. long period comets  E. Amor asteroids 100%    Score: 1/1
7.
	The Oort Cloud is thought to be Student Response Value Correct Answer A. a cloud of asteroids moving between the orbits of Mars and Jupiter. B. the cloud of gas and dust from which our solar system formed. C. a cloud of debris that occasionally encounters the Earth, causing a meteor shower.  D. the spherical cloud of comets and some larger icy bodies surrounding the outer solar system. 100%    E. the material in the ecliptic plane that creates the zodiacal light. Score: 1/1
8.
	Long period comets are thought to reside mainly in the Student Response Value Correct Answer A. Interstellar Medium. B. Kirkwood gaps. C. Kuiper Belt. D. asteroid belt.  E. Oort Cloud. 100%    Score: 1/1
9.
	What are comets made of? Student Response Value Correct Answer A. silicates and rocky dust B. dark colored complex hydrocarbons C. methane, ammonia, and water ice D. metallic dust particles  E. all of the above 100%    Score: 1/1
10.
	The largest Kuiper Belt body is Student Response Value Correct Answer  A. Pluto. 0% B. Eris.    C. Chiron. D. Sedna. E. Charon. Score: 0/1
11.
	When it was determined that Sedna, the largest body in the Solar System to be discovered since Pluto, has a perihelion distance that is three times further out than Pluto and such an eccentric orbit that it has a period of thousands of years, it was placed in the Student Response Value Correct Answer  A. Oort Cloud. 100%    B. Rogue Comets. C. Kirkwood Gap. D. Kuiper Belt. E. Trojan Asteroids. Score: 1/1
12.
	Meteorites are valuable to astronomers because Student Response Value Correct Answer A. they prove that life can only exist on the Earth. B. they contain diamonds and gold.  C. they may provide evidence about the process in which the solar system was born. 100%    D. they reveal the contents of interstellar space. E. originated in other solar systems. Score: 1/1
13.
	Meteor shower debris is believed to come from Student Response Value Correct Answer  A. the disintegration of a short period comet over many returns to the Sun. 100%    B. deep space, far beyond the solar system, deflected by the gravity of another star. C. the crust of a differentiated type C asteroid, now broken up. D. the core of a differentiated type M asteroid, now broken up. E. the asteroid belt when Mars deflects it toward us annually. Score: 1/1
14.
	Iron meteorites are believed to come from Student Response Value Correct Answer A. deep space, far beyond the solar system, hence their unique crystal patterns.  B. the core of a dense M-type asteroid, now broken up. 100%    C. a broken up cometary nucleus, hence their shiny appearance. D. Mars, hence their reddish color. E. the crust of a differentiated type C asteroid, now broken up. Score: 1/1
15.
	A rock found on Earth that crashed down from space is called ________. Student Response Value Correct Answer A. an asteroid B. an impact  C. a meteorite 100%    D. a meteor Score: 1/1
16.
	Which statement about asteroids is not true? Student Response Value Correct Answer  A. If we could put all the asteroids together, they would make an object about the size of Earth. 100%    B. Most asteroids are not spherical in shape. C. Many but not all orbit the Sun in the asteroid belt. D. Some are more like loosely bound piles of rubble than solid chunks of rock. Score: 1/1
17.
	What is Charon? Student Response Value Correct Answer  A. the largest of Pluto's three known moons 100%    B. the largest known asteroid C. the largest known Kuiper belt comet D. a captured moon of Neptune Score: 1/1
18.
	Which direction do a comet's dust and plasma tails point? Student Response Value Correct Answer A. always almost due north B. perpendicular to the ecliptic plane  C. generally away from the Sun 100%    D. straight behind the comet in its orbit Score: 1/1
19.
	According to current evidence, Pluto is best explained as ________. Student Response Value Correct Answer  A. a large member of the Kuiper belt 100%    B. a terrestrial planet that is surprisingly far from the Sun C. a very small jovian planet D. an escaped moon of Jupiter or Saturn Score: 1/1
20.
	What was the Shoemaker-Levy 9 impact? Student Response Value Correct Answer  A. the 1994 impact of a chain of comet fragments into Jupiter 100%    B. the impact that created the Moon's largest crater C. the ninth impact witnessed by astronomers in modern times D. the impact thought to have wiped out the dinosaurs Score: 1/1