Question 1

Which of the following is evidence for the connection between comets and meteor showers?

Accepted Answer

A)   Meteor and comets have the same appearance in the sky.
B)   Meteor showers always occur when a comet is visible.
C)   Meteor showers always occur 6 months after a comet passes Earth.
D)   Meteor showers are an annual event. Many of these are known to be when the Earth crosses a comet's orbit.

Question 2

What does the presence of the Widmanstätten patterns in iron meteorites tell us about their history?

Accepted Answer

The answer of What does the presence of the Widmanstätten...

Question 3

____ asteroids are more common in the outer asteroid belt where it is cooler. They are darker and may be carbonaceous.

Accepted Answer

A)   S-type
B)   M-type
C)   C-type

Question 4

The gas tail of a comet always

Accepted Answer

A)   trails behind the head along the orbital path.
B)   extends ahead of the head along the orbital path.
C)   points toward the sun.
D)   points away from the sun.
E)   points perpendicular to the orbital path.

Question 5

Meteorites seem to be primarily composed of material very similar to the material in asteroids.

Accepted Answer

A) True 
 B)False

Question 6

The ____________________-type asteroids are generally found in the outer portion of the asteroid belt and are very dark.

Accepted Answer

The answer of The ____________________-type asteroids are generally found in...

Question 7

Most of the asteroids orbit the sun in a belt between the orbits of

Accepted Answer

A)   Venus and Earth.
B)   Earth and Mars.
C)   Jupiter and Saturn.
D)   Mercury and Venus.
E)   Mars and Jupiter.

Question 8

What characteristic of long-period comets suggest they come directly from the Oort cloud?

Accepted Answer

A)   They have longer dust tails than short-period comets.
B)   Their orbits have random inclinations with respect to the ecliptic plane.
C)   Their orbits are nearly circular.
D)   They tend to appear larger in diameter than short-period comets.

Question 9

One currently accepted theory suggests that the bodies in the Oort cloud formed

Accepted Answer

A)   near the present orbits of the terrestrial planets and were then ejected by them.
B)   near the present orbits of the Jovian planets and were then ejected by them.
C)   right there in the Oort cloud very far from the sun.

Question 10

How does the dirty snowball theory explain the observed characteristics of comets?

Accepted Answer

The dirty snowball theory, proposed by a...

Question 11

The ____ is a disk-shaped cloud of icy bodies believed to extend from about 40 AU (the orbit of Pluto)  out to 100 AU. It is believed that most short-period comets originate from this region.

Accepted Answer

A)   Oort cloud
B)   Widmanstätten cloud
C)   Apollo-Amor
D)   Kirkwood region
E)   Kuiper belt

Question 12

The meteors in meteor showers are believed to be the debris left behind in comet orbits.

Accepted Answer

A) True 
 B)False

Question 13

Meteorites seem to be primarily composed of material very similar to the material in comets.

Accepted Answer

A) True 
 B)False

Question 14

A(n) ____________________ occurs when a bit of material enters Earth's atmosphere and becomes incandescent due to friction with the atmosphere.

Accepted Answer

The answer of A(n) ____________________ occurs when a bit of...

Question 15

The majority of meteorite finds are iron meteorites.

Accepted Answer

A) True 
 B)False

Question 16

How might we explain the origin of the different types of meteorites among the asteroids?

Accepted Answer

The answer of How might we explain the origin of...

Question 17

Carbonaceous chondrites have been heated to high temperature at least once since they formed.

Accepted Answer

A) True 
 B)False

Question 18

After formation, a carbonaceous chondrite asteroid could produce an iron core and a rocky silicate mantle if it melted then

Accepted Answer

A)   differentiated.
B)   outgassed.
C)   condensed.
D)   accreted.
E)   sublimed.

Question 19

What evidence exists that some of the asteroids were geologically active in the distant past?

Accepted Answer

A)   A few of the larger asteroids show similar reflectance spectra (colors)  similar to achondrite stony lava-like meteorites.
B)   A few of the larger asteroids show similar reflectance spectra (colors)  similar to carbonaceous chondrite meteorites.
C)   A few of the larger asteroids show similar reflectance spectra (colors)  similar to Jovian planets .

Question 20

The impact of a large asteroid comet with Earth has been proposed to have caused the extinction of the dinosaurs. The impact site of this comet is in or near

Accepted Answer

A)   Iowa.
B)   Hudson Bay.
C)   Crater Lake, Oregon.
D)   Canberra, Australia.
E)   Chicxulub, Mexico.

Exam 19: Meteorites, Asteroids, and Comets

Which of the following is evidence for the connection between comets and meteor showers?

Correct AnswerverifiedShow Answer

Meteorites seem to be primarily composed of material very similar to the material in asteroids.

Correct AnswerverifiedShow Answer

A(n) ____________________ occurs when a bit of material enters Earth's atmosphere and becomes incandescent due to friction with the atmosphere.

Correct AnswerverifiedShow Answer

The impact of a large asteroid comet with Earth has been proposed to have caused the extinction of the dinosaurs. The impact site of this comet is in or near

Correct AnswerverifiedShow Answer

How does the dirty snowball theory explain the observed characteristics of comets?

Correct AnswerAnswered by ExamLex AIThe dirty snowball theory, proposed by a...View AnswerShow Answer

One currently accepted theory suggests that the bodies in the Oort cloud formed

Correct AnswerverifiedShow Answer

The ____ is a disk-shaped cloud of icy bodies believed to extend from about 40 AU (the orbit of Pluto) out to 100 AU. It is believed that most short-period comets originate from this region.

Correct AnswerverifiedShow Answer

The majority of meteorite finds are iron meteorites.

Correct AnswerverifiedShow Answer

Meteorites seem to be primarily composed of material very similar to the material in comets.

Correct AnswerverifiedShow Answer

What characteristic of long-period comets suggest they come directly from the Oort cloud?

Correct AnswerverifiedShow Answer

How might we explain the origin of the different types of meteorites among the asteroids?

Correct AnswerverifiedShow Answer

The gas tail of a comet always

Correct AnswerverifiedShow Answer

Most of the asteroids orbit the sun in a belt between the orbits of

Correct AnswerverifiedShow Answer

What evidence exists that some of the asteroids were geologically active in the distant past?

Correct AnswerverifiedShow Answer

The meteors in meteor showers are believed to be the debris left behind in comet orbits.

Correct AnswerverifiedShow Answer

What does the presence of the Widmanstätten patterns in iron meteorites tell us about their history?

Correct AnswerverifiedShow Answer

Carbonaceous chondrites have been heated to high temperature at least once since they formed.

Correct AnswerverifiedShow Answer

____ asteroids are more common in the outer asteroid belt where it is cooler. They are darker and may be carbonaceous.

Correct AnswerverifiedShow Answer

The ____________________-type asteroids are generally found in the outer portion of the asteroid belt and are very dark.

Correct AnswerverifiedShow Answer

After formation, a carbonaceous chondrite asteroid could produce an iron core and a rocky silicate mantle if it melted then

Correct AnswerverifiedShow Answer

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The dirty snowball theory, proposed by a...
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