|
|
Multiple Choice |
10 points
|
|
|
Question In the basalt sample
depicted below, the former vesicles (small spherical
cavities) which are now filled with minerals were most
likely formed by ________.
|
Answer |
|
a) Air bubbles entrained in the flow during the
eruption
|
|
b) Vaporizing of sea water during an underwater
eruption
|
|
c) The weathering and erosion of olivine
crystals after the eruption
|
|
d) The escape of gas bubbles dissolved in the
lava during the eruption
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question Using the figure below, what
type of lava is most likely to erupt at tectonic setting
“C”?
|
Answer |
|
a) basalt
|
|
b) obsidian
|
|
c) andesite
|
|
d) all of the above
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question Using the image below of the
Yellowstone hot spot, determine in what relative direction
the North American Plate has been moving since ~ 16.1 MA.
|
Answer |
|
a) To the Southwest
|
|
b) To the Northwest
|
|
c) To the Southeast
|
|
d) To the Northeast
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question Which of the following
statements about lava is true?
|
Answer |
|
a) High temperature lavas are less viscous than
low temperature lavas
|
|
b) The more gas a lava contains, the less
violent the eruption
|
|
c) The viscosity of a lava increases as the
silica content decreases
|
|
d) All of the above
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question 2. Which of the following
volcanic flows move at the greatest velocity?
|
Answer |
|
a) basaltic lava flows
|
|
b) rhyolitic lava flows
|
|
c) lahars
|
|
d) pyroclastic flows
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question Rocks formed from large,
angular pyroclastic fragments are called volcanic_______.
|
Answer |
|
a) conglomerates
|
|
b) domes
|
|
c) breccia
|
|
d) tuff
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question The largest and most violent
volcanic eruptions are associated with _______.
|
Answer |
|
a) fissure eruptions
|
|
b) cinder cones
|
|
c) felsic-composition dome-shaped voclanoes
|
|
d) shield volcanoes
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question What caused dust and
condensing material to accrete into planetesimals?
|
Answer |
|
a) nuclear fusion
|
|
b) rotation of the proto-sun
|
|
c) gravitational attraction and collisions
|
|
d) heating of gases
|
|
|
|
|
Multiple Choice |
10 points
|
|
|
Question You are a planetary
scientist hired by NASA to search other galaxies for planets
that may be suitable for humans to survive on the surface.
Which of the following principles or ideas would you use in
your task? |
Answer |
|
a) Look for a planet that is the same relative
size as the earth
|
|
b) Look for a planet that is orbiting a star at
the same distance that the Earth orbits the sun.
|
|
c) Look for a solar system containing a very
large outer planet protecting the inner planets of
that solar system from frequent meteor impacts.
|
|
d) All of the above
|
|
e) None of the above
|
|
|
|
|
True/False |
10 points
|
|
|
Question One of the theories
suggesting why Mars does not have as thick of an atmosphere
as Earth is due to its relatively small size and consequent
smaller gravitational force potential. |
Answer |
|
True |
|
False |
|
|