ESS 101 Midterm exam
with correct questions
and answers
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[COMPANY NAME] [Company address]
,1. As igneous
rock partially melts the magma is typically .
a. more mafic (Fe-rich) than the rock
b. more felsic (silica-rich) than the rock
c. lower density than the rock
d. answers a and c are both correct
e. answers b and c are both correct Answer: e
2. The silicate mineral amphibole has 50% of its silicate tetrahedra
possessing 3-shared oxygen atoms and
1- unshared and 50% of its silicate tetrahedra possessing 2-
shared oxygen atoms and 2-unshared oxygen
atoms. What is the ratio of Si Answer:O in the tetrahedral structure of
this mineral?
a. 1 Answer:4
b. 1 Answer:3
c. 1 Answer:2.75
d. 1 Answer:2.5
e. 1 Answer:2 Answer: c
3. Match the magma/lava type with the appropriate
geographic/tectonic setting where it likely formed Answer:
Columbia Plateau
a. basalt
b. granite
c. andesite
d. peridotite
e. rhyolite Answer: a
4. Match the magma/lava type with the appropriate
geographic/tectonic setting where it likely formed Answer:
Asthenosphere
a. basalt
b. granite
c. andesite
,d. peridotite
e. rhyolite Answer: d
5. Match the magma/lava type with the appropriate
geographic/tectonic setting where it likely formed Answer: Mount
Fuji
, a. basalt
b. granite
c. andesite
d. peridotite
e. rhyolite Answer: c
6. What kind of tectonic setting is represented by the Ural
Mountains, which separate Asia from Europe?
a. ancient divergent margin
b. ancient convergent margin (ocean-continental subduction)
c. ancient convergent margin (ocean-ocean subduction)
d. ancient hotspot
e. ancient collision margin (continent-continent) Answer: e
7. Following differentiation the Earth became compositionally
zoned according to .
a. valency state of constituent atoms
b. total volume of constituent matter
c. density of constituent matter
d. magnetic properties of constituent matter
e. none of the above answers are correct as the earth is not
compositionally differentiated Answer: c
8. The cause of volcanism observed in the
Andes Mountains (South America) is most similar to that of .
a. Yellowstone Park
b. Japan
c. the Columbia Plateau
d. Himalaya Mountains
e. the Hawaiian Islands Answer: b
9. What scientific observations of the solar system indicate that
the sun and planets formed from a rotating,
disk-shaped, nebular dust cloud?
a. The planets all revolve in a counter-clockwise direction around the
sun
with correct questions
and answers
usr
[COMPANY NAME] [Company address]
,1. As igneous
rock partially melts the magma is typically .
a. more mafic (Fe-rich) than the rock
b. more felsic (silica-rich) than the rock
c. lower density than the rock
d. answers a and c are both correct
e. answers b and c are both correct Answer: e
2. The silicate mineral amphibole has 50% of its silicate tetrahedra
possessing 3-shared oxygen atoms and
1- unshared and 50% of its silicate tetrahedra possessing 2-
shared oxygen atoms and 2-unshared oxygen
atoms. What is the ratio of Si Answer:O in the tetrahedral structure of
this mineral?
a. 1 Answer:4
b. 1 Answer:3
c. 1 Answer:2.75
d. 1 Answer:2.5
e. 1 Answer:2 Answer: c
3. Match the magma/lava type with the appropriate
geographic/tectonic setting where it likely formed Answer:
Columbia Plateau
a. basalt
b. granite
c. andesite
d. peridotite
e. rhyolite Answer: a
4. Match the magma/lava type with the appropriate
geographic/tectonic setting where it likely formed Answer:
Asthenosphere
a. basalt
b. granite
c. andesite
,d. peridotite
e. rhyolite Answer: d
5. Match the magma/lava type with the appropriate
geographic/tectonic setting where it likely formed Answer: Mount
Fuji
, a. basalt
b. granite
c. andesite
d. peridotite
e. rhyolite Answer: c
6. What kind of tectonic setting is represented by the Ural
Mountains, which separate Asia from Europe?
a. ancient divergent margin
b. ancient convergent margin (ocean-continental subduction)
c. ancient convergent margin (ocean-ocean subduction)
d. ancient hotspot
e. ancient collision margin (continent-continent) Answer: e
7. Following differentiation the Earth became compositionally
zoned according to .
a. valency state of constituent atoms
b. total volume of constituent matter
c. density of constituent matter
d. magnetic properties of constituent matter
e. none of the above answers are correct as the earth is not
compositionally differentiated Answer: c
8. The cause of volcanism observed in the
Andes Mountains (South America) is most similar to that of .
a. Yellowstone Park
b. Japan
c. the Columbia Plateau
d. Himalaya Mountains
e. the Hawaiian Islands Answer: b
9. What scientific observations of the solar system indicate that
the sun and planets formed from a rotating,
disk-shaped, nebular dust cloud?
a. The planets all revolve in a counter-clockwise direction around the
sun
