20 Jul THE PLACE WHERE THE OCEAN FLOOR SUDDENLY PLUNGES DOWNWARD
1. The place where the ocean floor suddenly plunges downward iscalled the
A. continental shelf.
B. continental slope.
C. abyssal plain.
D. abyssal hill.
2. Which one of the following statements is accurate regardingglaciers and erosion?
A. Striations caused by moving glaciers help determine the age of arock.
B. Glaciers erode the base of mountains into basins calledcirques.
C. Moving valley glaciers create V-shaped valleys.
D. Glaciers can carry both small particles and large boulders.
3. The process that uses a half-life in its computation is
A. evolution.
B. adaptation.
C. intrusion.
D. radioactive dating.
4. Which one of the following times would be the longest?
A. Jurassic period
B. Carboniferous period
C. Paleozoic era
D. Mesozoic era
5. A _______ moraine forms when a glacier deposits till at itssides.
A. lateral
B. ground
C. end
D. terminal
6. The force that causes the ocean tides is
A. gravity.
B. the Coriolis effect.
C. tsunamis.
D. a swell.
7. Scientists believe that humans arrived on Earth during the_______ Period.
A. Quaternary
B. Tertiary
C. Cretaceous
D. Triassic
8. What must occur for a fossil to form?
A. The organism must fall into igneous rock.
B. The organism must be buried in sediment soon after it dies.
C. The organism must go through a process of petrification.
D. The climate where the organism dies must not be too cool.
9. According to the theory of evolution, an organism increases itschance of survival through a process known as
A. intrusion.
B. adaptation.
C. unconformity.
D. superposition.
10. In which one of the following regions would you expect to findthe largest amounts of dissolved oxygen in the ocean water?
A. Near the equator
B. In temperate zones
C. In polar regions
D. In the deep ocean floor
11. Which one of the following landforms would be created byoutwash?
A. Moraines
B. Eskers
C. Drumlins
D. Erratics
12. Which one of the following statements suggests relativeage?
A. The top layer of sedimentary rock isn’t as old as the layersbeneath it.
B. Earth was formed 4.6 billion years ago.
C. The Phanerozoic era lasted about 540 million years.
D. Some layers of shale are 265 million years old.
13. When sediments fall out of a glacier, they create a depositcalled
A. kettle.
B. kames.
C. eskers.
D. till.
14. What problem does an unconformity present?
A. It weakens the crust so earthquakes are more prevalent.
B. It allows magma to escape to the surface of Earth.
C. It leaves a gap in the geological record.
D. It doesn’t contain any fossils for geologists to study.
15. The half-life of an element is important for determining the_______ of a rock.
A. decomposition rate
B. relative age
C. absolute age
D. mineral makeup
16. Which one of the following time references best fits theconcept of geologic time?
A. A dozen years
B. A hundred years
C. A thousand years
D. A million or more years
17. Of the following mineral elements, which one is dissolved ingreatest abundance in the world’s oceans?
A. Magnesium
B. Potassium
C. Calcium
D. Sodium
18. Which one of the following situations would you expect tocreate the highest waves in the ocean?
A. A 50-kilometer-per-hour wind blowing for 5 hours across a100-kilometer-wide area of ocean
B. A 50-kilometer-per-hour wind blowing for 10 hours across a1000-kilometer-wide area of ocean
C. A 100-kilometer-per-hour wind blowing for 5 hours across a100-kilometer-wide area of ocean
D. A 100-kilometer-per-hour wind blowing for 10 hours across a1000-kilometer-wide area of ocean
19. Alpine glaciers can be found on which one of the followinglandforms?
A. Flat plains
B. Mountain valleys
C. Mountain bases
D. Lowland hills
20. What drives currents deep in the ocean?
A. Wind
B. Increased temperatures
C. Differences in water density
D. Decreased salinity
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