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H.W.4

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
That Earth ____ , evidence that Earth differentiated.
a.
rotates slowly
b.
has an average density that is higher than the density of the crust
c.
has a no magnetic field
d.
has a surface that is 75% water
e.
all of these
 

 2. 
The central regions of Earth's core are 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.
 

 3. 
The youngest parts of Earth's crust are
a.
the bottom layer found in the walls of the Grand Canyon.
b.
the continents.
c.
the continental margins.
d.
the Appalachian Mountains.
e.
the midocean rifts.
 

 4. 
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
 

 5. 
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.
 

 6. 
Slow surface evolution on the moon is limited to
a.
low 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
 

 7. 
Compared to the Earth, the moon is no longer geologically active because
a.
it is rotating too slowly.
b.
its radioactive elements were never abundant.
c.
it is much smaller in mass.
d.
its crust is too thin.
e.
it does not have water on its surface.
 

 8. 
In the condensation theory of the Moon's origin
a.
the Moon broke from a rapidly spinning Earth
b.
the Earth and its Moon formed from the same cloud of matter
c.
the Moon formed elsewhere in the solar nebula and was later captured by Earth.
d.
the Moon formed when a very massive planetesimal smashed into the young Earth.
 

 9. 
That Mercury has a large iron core is evidenced by
a.
the large lobate scarps.
b.
the large mean density of Mercury.
c.
the lava flows near Caloris Basin.
d.
all of the above
e.
none of the above
 

 10. 
Which of the following are not found on Venus?
a.
arachnoids
b.
coronae
c.
rolling plains
d.
lobate scarps
e.
high atmospheric pressure
 

 11. 
The surface of Venus has been studied
a.
using radar maps made from Earth.
b.
using radar maps made from satellites orbiting Venus.
c.
using spacecraft that have landed on the surface of Venus.
d.
all of the above
e.
only b and c
 

 12. 
The greenhouse effect keeps Venus hot because
a.
the atmosphere contains free oxygen.
b.
the atmosphere is predominently 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.
 

 13. 
How rapidly a planet loses its atmosphere depends on the planet's

I.escape velocity (determined by mass and radius)
II.atmospheric composition
III.temperature
IV.rotation period
a.
I & II
b.
III & IV
c.
I, II, & III
d.
II, III, & IV
e.
I, II, III, & IV
 

 14. 
____ is a very long and deep canyon on Mars.
a.
Valles Marineris
b.
Ishtar Terra
c.
Tharsis Bulge
d.
Lobate Scarp
e.
Phobos
 

 15. 
Besides Earth, 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?
a.
Venus
b.
The Moon
c.
Phobos
d.
Mars
e.
None of the terrestrial planets or satellites show such evidence.
 



 
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