Transcript Slide 1

Fix
Astronomy
Chapter 9
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Question 1
The synchronous rotation period of the Moon is due to
A. tidal forces.
B. the Earth's magnetic field.
C. meteoroid impacts.
D. the composition of the Moon.
E. lack of lunar magnetic field.
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Question 2
Due to variations in the Moon's distance, if the angular
diameter of the Moon is slightly less than the angular
diameter of the Sun, what type of eclipse could occur?
A. total lunar eclipse
B. annular solar eclipse
C. partial solar eclipse
D. partial lunar eclipse
E. total solar eclipse
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Question 3
Eclipses do not occur each month because
A. the Moon is always in the ecliptic.
B. the Moon's orbit is tilted at 7.45° with respect to the
Sun.
C. the Moon's orbit is tilted at 5° with respect to the
ecliptic.
D. the Earth's axis is tilted to the ecliptic.
E. the precession of the Earth's axis.
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Question 4
If part of the full Moon passes through the Earth's shadow,
we will see a
A. total lunar eclipse.
B. partial solar eclipse.
C. partial lunar eclipse.
D. total solar eclipse.
E. total annular eclipse.
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Question 5
We can rule out the idea that the Earth and Moon formed at
the same time from the solar nebular because
A. they have different rotation rates.
B. they have different densities that cannot be explained by
Earth's larger gravity.
C. they have different sizes.
D. they have different surfaces.
E. the Moon is made of metal and the Earth is made of
rock.
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Question 6
Moon rocks contain less concentration of iron and other
dense materials than equivalent rocks on Earth.
A. True
B. False
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Question 7
Which lunar features best indicate past fluid flow (molten
material) on the lunar surface?
A. craters
B. rays
C. maria
D. mountains
E. rilles
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Question 8
If the present rate of recession continues, in about 1.1
billion years, the Moon will be so distant that its umbral
shadow will no longer reach Earth. Total solar eclipses
will cease to be visible from the Earth.
A. True
B. False
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Question 9
Humans first walked on the surface of another body (Moon)
during the flight of Apollo _____ (number), which took
place on July 20, 1969.
A. 8
B. 9
C. 10
D. 11
E. 12
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Question 10
Which theory about the origin of the Moon has gained wide
acceptance over the last 20 years?
A. fission
B. binary accretion
C. capture
D. giant impact
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Question 11
Suppose a solar eclipse occurred today. What is the
soonest that another eclipse could occur and what kind
of eclipse would it be?
A. a lunar eclipse 2 weeks from now
B. a lunar eclipse in 1 month
C. a solar eclipse 2 weeks from now
D. a solar eclipse in 1 month
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Question 12
If the Moon did not rotate on its own axis, we would
observe
A. both sides of the Moon.
B. trick question - it doesn't rotate.
C. only one side of the Moon.
D. a lack of tides on the Earth.
E. only solar tides.
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Question 13
Consider the following hypothetical situation. A spacecraft lands on a
moon of one of the planets. The moon has a smooth surface
resembling that of the lunar maria. The rocks on the surface are
found to be 4.5 billion years old. Why would such a finding be highly
unusual?
A. Such rocks are far older than any found on the Earth's moon.
B. If the surface is that old, it should be heavily cratered.
C. The maria rocks on the Earth's moon are much older than 4.5 billion
years.
D. There should not be rocks on maria.
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1. A
5. B
9. D
13. B
2. B
6. A
10. D
3. C
4. C
7. C
8. A
11. A12. A
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