Download Practice Test-1 - Florida International University

GLY 1010: Introduction to Earth Science
Summer B 2013: Midterm Exam (100 points)
1. The second most abundant element in the Earth is. A) Oxygen B) silicon C) Iron
D) Nitrogen
2. The lithosphere is approximately ____ km thick .A) 40 B) 2000 C) 8 D) 100
3. Which of the following features is not associated with a ocean-ocean convergent
plate boundary? A) continental mountain belts B) mid-oceanic ridges C) Rift
Valley D) None of the above is associated with a ocean-ocean convergent margin
4. Earth’s outer core is made of A) solid rock with small amount of melt B) Solid Iron
C) Solid Silicate rich rock B). Liquid Iron
5. Our Universe formed at about A) 13 billion years ago B) 10 billion years ago C) 4.5
billion years ago D) 500 million years ago
6. How thick is the Earth's oceanic crust? A) about 100 km B) about 8 km C) about
40 km D) about 400 km
7. Which layer of our earth is rich in aluminum, silcon and oxygen? A)
Asthenosphere B) Mantle C) Outer core D) continental crust
8. The East African Rift Valley represent what kind of plate boundary? A) Transform
B) Divergent C) Convergent D) none of the above
9. Which of the following events is not related to the collision of our earth with
another planet early in the history of our solar system? A) tilting of earth’s axis of
rotation B) formation of our moon C) separation of the earth in layers of different
composition D) Extinction of the dinosaurs.
10. Which of the following can be called a hypothesis? A) our earth orbits the Sun. Ba
black cat crossing your path brings bad luck. C) Exam results are proportional to
the number of hours you study D) all of the above
11. The direction of magnetism in the sequence of geologic formations in the cross
section (not a map) below indicates that this land ……. A) was near the south pole
100 million years ago and moved near the equator now B) was near the equator
100 million years ago and had moved to the north pole now. C) was near the North
pole and has moved to equator now D) was near the equator and has moved to
South pole now (assume there was no magnetic polarity reversal)
12. Seafloor magnetic anomalies indicate that A) New ocean floors are created at the
mid-oceanic ridge B) ocean floors spread away from the mid-oceanic ridge C)
older ocean floor have stronger magnetic signature D) both A and B
13. Which among the following minerals has the lowest hardness? A)
corundum B) feldspar C) quartz D) topaz
14. . Aa lavas indicates that A) lava was very fluid B) lava was very dry C) Lava
solidified under water D) lava was full of gases.
15. . Which of the following igneous bodies is a discordant intrusive rock? A) dike B)
pluton C) sill D) These are all discordant intrusives
16. . Which of the following substances is not considered a mineral? A) Diamond
B) rock salt C) snow flake D) coal
17. Magma cannot be generated in the mantle by ______ A) increasing pressure B)
increasing temperature C) decreasing pressure D) introduction of water
18. Which of the following is indicative of an imminent volcanic eruption ? A) hot
springs and geysers B) steepening of the slopes of a volcano C) Giant Tsunamis D)
All of the above are indicative of imminent volcanic eruption.
19. Conglomerate is a A) pyroclastic rock made of bombs B) pyroclastic rock made
of ash C) pyroclastic rock made of angular fragments of rocks D) Clastic rock made
of pebbles
20. The first minerals to crystallize out of a magma is likely to be more A) felsic, B)
mafic, C) of the same composition as the magna D) can be any of these
21. The mineral plagioclase is an example of a ________ silicate. A) framework
single chain C) sheet D) ring
B)
22. Which among the following is a phosphate? A) Calcite B) Apatite C) Pyrite D)
gypsum
23. Chlorine has a mass number of 35 and atomic number = 17. Therefore chlorine
has ____ A) 35 neutrons B) 17 neutrons C)18 neutrons d) 18 electrons
The following is a picture of a slide (also called thin section) made of a fine grained
igneous rock. Use this picture for questions 24-25
Plagioclase
Tiny crystals and glass
Pyroxene
24. What rock is this? A) Basalt B) Rhyolite C) Diorite D) Gabbro
25. Where are such rocks found? A) Mantle B) Ocean Floor C) Arc Volcanoes D) None
of the above
26. Bonding formed by sharing of electrons A) Ionic B) Electronic C) Covalent
D)divalent
27.According to Wegener’s “Theory of Continental Drift” the super continent Pangaea
broke into Laurasia and _________ A)Eurasia B) Cathaysia C) Amnesia D) Gondwana
28. Which of the following is true about a shield volcano? A) lava was very fluid B)
Lava was very viscous C) volcanism was explosive D) forms only on divergent
plate boundaries.
29. Arrange the following rocks according to their resistance to chemical
weathering: A) Granite, Limestone, Peridotite, Quartzite B) Limestone, Granite,
Peridotite, Quartzite C) Limestone, Peridotite, Granite, , Quartzite D) Quartzite,
Peridotite, Granite, Limestone
30 .Where would chemical weathering be most extensive? A) Steep mountain side
with thick soil B) Steep mountain side with no soil or vegetation cover C) Flat
Valley floor with no soil cover D) Flat Valley floor with thick soil cover.
31 Breaking of rocks along parallel sheet like layers is known as ____ A) Spheroidal
weathering B) Exfoliation C) Frost wedging D) None of the above
32 Regolith is the name for ____ A) organic matter in soil B) blanket of weathered
material found on the surface C) soil of dry climate D) rocks formed by
retrogressive metamorphism
33 Roundness of clastic sediments is a measure of it’s A) weathering B) Transport C)
Silica content D) Grain size
34 Which, among the following minerals is not found in contact metamorphosed
rocks? A) Andalusite B) Cordierite C) Wollastonite D) Staurolite
35 Which of the following lists is written in order of decreasing particle
size? A) sandstone, siltstone, conglomerate B) siltstone, sandstone,
conglomerate, C) conglomerate, sandstone, siltstone D) siltstone,
conglomerate, sandstone
36 Most likely environment of deposition of a well sorted, well rounded sandstone :
A) glaciers B) Deep Ocean C) Ocean beach D) Desert
37 Which of the following describes Chert? A) a fine grained biogenic sedimentary
rock B) formed by the accumulation of dead foraminifera shells C) a fine grained
silica rich non- clastic rock. D) All of the above
38 Which of the following sets is arranged in order of increasing metamorphic
grade? A) shale, slate, phyllite B) phyllite, gneiss, schist C) phyllite, slate,
schist D) schist, shale, gneiss
39 Greenstones form near ____ A) mid-oceanic ridge B) fault Planes C) Igneous pluton
s D) Hot spots
40 Which among the following sedimentary structures indicate the direction of
current? A) Graded Bedding B) Symmetrical ripple C) Asymmetric ripple D) All of
the above
41 Lines on the map marking the first appearance of an index mineral are known as
___ A) Isotope B) Isochron C) Schistosity D) isograd
42 Which of the following lists is arranged in the proper order according to the
grade of metamorphism: A) chlorite-sillimanite-garnet B) Garnet-sillimanitechlorite C) Sillimanite-Garnet-Chlorite D) Sillimanite-chlorite-garnet
43 A metamorphic rock where the foliation is defined by large mica crystals visible
with naked eye: A) Slate B) Schist C) Phyllite D) Gneiss
44 . Hornfels facies is associated with what kind of metamorphism? A) Regional B)
Conatct C) Hydrothermal D) cataclastic
45 The youngest igneous rocks in the ocean floor is found _______ A) where the ocean
is shallowest B) at the mid-oceanic ridge C) near the continental margin D) where
the ocean is deepest.
46 An amygdule is _____ A) a metamorphic facies B) found in volcanic rocks C) a type
of pyroclastic rock D) a non-clastic sedimentary rock.
47 What kind of soil is characteristic of dry climate? A) laterite b) Pedalfer C)
Pedocal D) All of these can be present in dry climate
48 Which soil horizon is known as the zone of leaching? A) A B) B C) C D) R
49 Sinkholes in Florida are a result of which kind of chemical weathering? A)
Oxidation B) Hydration C) Carbonation D) none of the above
50 The field G in the diagram below represents __________ facies. A) Hornfels B)
blueschist C) Zeolite D) Eclogite