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| From | Sergio <invalid@invalid.com> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Astronomy Questions 3 for Physics |
| Date | 2016-07-22 21:01 -0500 |
| Organization | Aioe.org NNTP Server |
| Message-ID | <nmuj69$2d0$1@gioia.aioe.org> (permalink) |
SAMPLE EXAM 3 for ASTR I on CH's 6,7,8
1. What are the cores of the terrestrial planets primarily
composed of?
a. silicates
b. iron and magnesium
c. iron and nickel
d. lead and uranium
2. Differentiation is
a. the sinking of the densest elements to the center of a
planet.
b. the ordering of the planets from the Sun according to
density, with the most dense being located closest to the
Sun.
c. the erosion process operating on the terrestrial planets.
d. the loss of light weight gases from a planet's atmosphere.
3. The production of a planetary magnetic field requires
a. high planetary mass.
b. at least one satellite.
c. an atmosphere.
d. rotation.
e. a ring around the planet.
4. If the Moon were covered with large amounts of water, its
albedo would be
a. less than it currently is.
b. the same as it currently is.
c. greater than it currently is.
5. Ozone is
a. the main form of oxygen found in the Earth's atmosphere at
sea-level.
b. the type of oxygen found in most lunar rocks.
c. the form of oxygen given off by plants.
d. the form of oxygen found in the upper atmosphere of the
Earth.
6. The principal source of heat to the Earth's atmosphere is
a. the heating of the surface by the Sun.
b. volcanism on the Earth.
c. continental drift.
d. release of stored heat from the hot core of the Earth.
7. If the Earth's interior were entirely solid, which of the
following statements is true?
a. only P waves would travel through the Earth
b. only S waves would travel through the Earth
c. both P and S waves would travel through the Earth
d. neither P nor S waves would travel through the Earth
8. The Van Allen belts are
a. regions on Earth, near the north and south poles, in which
aurorae are observed.
b. regions near the Earth's equator where the gravitational
field is minimized.
c. zones containing charged particles surrounding the Earth.
d. regions in the Earth's mantle where certain minerals occur
with high abundance.
9. Large scale changes on the surface of the Earth are probably
caused by
a. wind erosion.
b. continental drift.
c. glaciation.
d. water erosion.
e. micrometeoroid impact.
10. Which of the following gases was NOT present in the early Earth
atmosphere?
a. methane
b. ammonia
c. hydrogen
d. oxygen
e. water vapor
11. The Moon lacks a permanent atmosphere because
a. it never had one to begin with.
b. its gravity is too small to hold a permanent atmosphere.
c. the Earth's strong gravity pulled it away.
d. its atmosphere condensed and fell to the surface because it
was so cold.
12. Which of the following processes of erosion occurs today on the
lunar surface?
a. plate tectonics
b. lava flows
c. wind
d. meteoritic impacts
13. The strong lunar magnetic field is evidence for
a. a molten core.
b. rapid rotation of the core.
c. present day volcanic activity.
d. the fission theory of lunar formation.
e. nothing, since the Moon has no overall magnetic field.
14. The maria are thought to have originated as
a. bodies of water which are now dried-up.
b. lava flows.
c. uplifted plains (highlands).
d. areas eroded by wind before the Moon lost its atmosphere.
15. Which one of the following is NOT true about Mercury?
a. highly eccentric orbit
b. orbital period of 88 days
c. orbit is retrograde
d. orbit shows large (7) tilt to ecliptic
e. average distance from the Sun is 0.4 A.U.
16. Which of the following characteristics indicate that Mercury
should NOT have an atmosphere?
a. high temperature
b. spin-orbit coupling
c. high density
d. small diameter
17. Which one of the following is important in producing the
greenhouse effect?
a. slow rotation
b. carbon dioxide
c. strong magnetic field
d. rapid rotation
e. oxygen
18. Which of the following statements is true?
a. all planetary orbits lie within the ecliptic
b. all planetary orbits are circles to within the accuracy of our
measurements
c. as viewed from the north pole, all planets revolve
counterclockwise
d. the rotation axis of each planet is perpendicular to its
orbital plane
e. planets always rotate in the same direction in which they revolve
19. Asteroid-sized bodies which formed the cores of the larger
planets are known as
a. asteroids.
b. the solar nebula.
c. planetesimals.
d. planetoids.
e. minor bodies.
20. Chemical differentiation of the Earth
a. has not occurred - the Earth is chemically homogeneous.
b. occurred early in its history, soon after it formed.
c. occurred only since homo sapiens have been around.
d. was caused by the spin of the Earth, which concentrated the
heavy elements like iron at the equator.
21. Below are statements concerning lunar formation. Synthesize your
knowledge of lunar and planetary formation to place them in
chronological order from the time of formation:
I. coalesced from orbiting debris
II. cooling of interior
III. mare formed
IV. surface melting by heavy bombardment
a. II, III, IV, I
b. III, II, IV, I
c. I, II, III, IV
d. IV, III, II, I
e. I, IV, III, II
22. The interplanetary dust is most similar to
a. cometary dust.
b. sand on the beach.
c. asteroid material.
d. carbonaceous chondrites.
e. hydrogen atoms.
23. Which of the following characterizes Jovian planets?
a. small size
b. high density
c. primarily hydrogen and helium
d. slow rotation
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Astronomy Questions 3 for Physics Sergio <invalid@invalid.com> - 2016-07-22 21:01 -0500
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