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Earthlike Planets
Multiple Choice Questions
1. Which of the following is not one of the four stages in the development of a
terrestrial planet?
a. flooding
b. cratering
c. slow surface evolution
d.accretion
e.differentiation
2. That Earth _______ is evidence that Earth differentiated,
a. rotates slowly
b. has an average density that is lower than the density of the crust
c. has a magnetic field
d.has a surface that is 75% water
e. all of these
3. The central regions of Earth's core are a solid because
a. the composition at the center of the core is lower in iron.
b. the pressure at the center raises the melting point.
c. the magnetic field cannot penetrate into the center of the core.
d.convection does not extend all the way to the center of the core.
e.Earth initially formed from solid particles in the solar nebula.
4. Earth's magnetic field is generated by the dynamo effect in the
a. molten metallic core.
b.solid central core.
c.plastic mantle.
d.the crust.
e.aurora.
5. The oxygen in Earth's atmosphere
a.was manufactured inside stars.
b.was added to the atmosphere by plant life.
c.has grown more abundant since the origin of Earth.
d.all of these
e.none of these
6. The gas that is most responsible for the greenhouse effect on Earth is
a.oxygen (02)
b.nitrogen (N2)
c. carbon dioxide (CO2)
d.ozone (03)
e.ammonia (NH3)
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7. Earth possesses few visible craters and the moon possesses many. This is because
a.Earth formed later than the moon and, therefore hasn't encountered as many
meteoroids.
b.the moon doesn't have an atmosphere that could burn up many of the meteorites before
impacting.
c.erosion and plate tectonics have slowly removed evidence of past cratering on Earth.
d.all of the above
e.only b and c
8 . The Himalayan mountains are rugged, jagged peaks and the Appalachians are smooth and
rolling. Why is there a difference?
a The Himalayas are much older and the rocks have begun breaking off.
b. The Himalayas are volcanic mountains and the Appalachians are not.
c. The Appalachians are much older and have been smoothed by erosion.
d. The Appalachians are younger and just started to be thrust upward by plate tectonics.
e.a and d
9. The ozone layer is
a. transparent to ultraviolet radiation.
b. opaque to ultraviolet radiation,
c.opaque to visible light.
d.opaque to infrared radiation.
e.responsible for producing most of the oxygen that animal life needs.
10. In the development of a planet, the stage of __________________ occurred when
molten rock flowed through fissures and filled deep basins.
a.differentiation
b. cratering
c.glaciation
d.accretion
e flooding
11. Slow surface evolution on the moon is limited to
a. Iow density masses of rock rising from the interior.
b. low level meteorite impacts.
c. moonquakes disturbing the surface features.
d.motion along a network of small faults.
e.all of the above.
12. The lunar maria are
a. the lava plains of the lunar lowlands.
b.the smooth plateaus of the lunar highlands.
c.less than one billion years old.
d.moving plates of lunar crust.
e.older than the lunar highlands.
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13. Which hypothesis concerning the formation of the moon makes predictions that best fit
the observed lunar data?
a.The large impact hypothesis
b.The fission hypothesis
c.The capture hypothesis
d.The condensation hypothesis
e.The regolith hypothesis
14. That the moon has no magnetic field implies that
a.the moon is spinning to slowly to produce a magnetic field.
b.the interior of the moon is too hot to produce a magnetic field.
c.the crust of the moon is so thick that the magnetic field can not get out of the interior
d. the moon's core contains little if any molten iron.
e. the moon is moving further from Earth.
15. The geology of Venus appears to be dominated by
a. volcanism.
b. plate tectonics.
c. erosion by flowing water.
d.impact cratering.
e.strip mining.
16. The greenhouse effect keeps Venus hot because
a. the atmosphere contains free oxygen.
b. the atmosphere is rich in carbon dioxide.
c. the surface converts infrared into visible radiation.
d. the surface is free of sulfur compounds.
e. the magnetic field traps a large number of particles from the solar wind.
17. Measurements of the magnetic field of Venus reveal that the
a.planet has a large iron core.
b.interior of the planet is molten.
c. planet has no detectable magnetic field.
d. planet rotates backwards.
e_ magnetic field is responsible for large auroral displays (northern lights) on Venus.
18. The flow patterns found on the surface of Mars suggest
a. that Mars is a water-rich world.
b. that the climate on Mars was different in the past.
c.that volcanism is occurring on Mars.
d.that the polar caps are made of water.
e.all of the above
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19. Which of the solar system objects listed below is most similar to Earth in terms of mass
& density?
a. Mercury
b. Moon
c. Venus
d. Mars
e. Uranus
20. The crust of Mars is believed to _______________ than Earth's.
a.be much thinner
b.be younger
c.contain more water
d.be more geologically active
e. be much stronger
21. The moons of Mars are believed to be
a.composed primarily iron and nickel.
b.composed primarily of frozen gases of water and carbon dioxide.
c.orbiting Mars in a direction opposite to the direction that Mars rotates.
d.formed from material ejected from Olympus Mons and other large volcanoes on Mars.
e.captured asteroids.
22. Mars has a sufficient mass and a low enough temperature that water molecules could
exist in its atmosphere. Why doesn't Mars' atmosphere contain a significant amount of
water?
a.Mars formed in a part of the solar nebula that lacked oxygen.
b.Mars formed in a part of the solar nebula that lacked hydrogen.
c.All of the water vapor was released in the impact that formed Deimos.
d.Ultraviolet radiation breaks the water molecule into less massive particles that can
escape.
e.The water molecule combines readily with chlorine to form hydrochloric acid.
Fill in the Blank Questions
1.
__________ is responsible for absorbing ultraviolet radiation in Earth's upper
atmosphere.
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2.
In the diagram below label each of the major divisions of Earth's interior.
Earth's Interior
3. _________ is the molecule most responsible for the greenhouse effect on Venus and
Earth.
4. The atmosphere of___________ contains acid compounds including sulfuric and
hydrochloric acid.
5. The largest of satellite orbiting a terrestrial planet is ___
6. The terrestrial planet with the oldest surface is ______
7. The terrestrial planet with the most moons is _______
8.The terrestrial planet with the most effective greenhouse effect is
9. Besides Farth, which of the terrestrial planets and/or satellites of terrestrial planets
show(s) evidence for the possible existence of liquid water flowing on its surface in the
past?
True-False Questions
1. The Earth never passed through the cratering stage in planetary development.
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2. The central part of Earth's core is solid.
3. Earth's magnetic field is generated in the iron rich mantle.
4. Earth's magnetic field has reversed itself.
5. Earth and the moon could not have condensed from the same materials because they
have different densities and compositions.
6. Venus is very hot because its atmosphere is rich in carbon dioxide.
Essay Question
1.Describe the four stages in the development of a terrestrial planet.
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