Oceans Test Review: Question Preview (ID: 24160)

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In 1947, Thor Heyerdahl sailed a simple raft from Peru to Polynesia, following the ocean currents for more than 6,000 Km. Which statement accurately describes what Heyerdahl proved by this voyage?
a) Ancient Peru was settled by people from Polynesia.
b) People from ancient Peru were the first settlers of Polynesia.
c) It would have been possible for people from ancient Peru to reach Polynesia by following ocean currents.
d) Polynesia was settled accidentally when rafts from Peru were carried out by ocean currents.

Which robotic vessel can withstand pressures much greater than those found in the deepest parts of the ocean.
a) Deep Flight
b) Geosat
c) Jason II
d) Alvin

Which piloted vessel is used to travel the deep ocean for many underwater missions, including searches for sunken ships, the recovery of a lost hydrogen bomb and explorations of the sea floor.
a) Deep Flight
b) Geosat
c) Jason II
d) Alvin

The longer it takes sound to return to a ship,
a) the louder the sound becomes.
b) the weaker the sound becomes.
c) the closer the ocean floor is in that spot.
d) the deeper the ocean floor is in that spot.

With SONAR, what happens to the sound pulses from a ship after they hit the ocean floor?
a) They stop.
b) They're absorbed into the mud.
c) They bounce back to the ship.
d) They get louder.

Where would the temperature of the ocean be the lowest?
a) near the poles in winter
b) near the equator
c) near the poles in summer
d) near the equator in winter

The base of the continental slope is called the __________.
a) continental shelf
b) abyssal plain
c) continental rise
d) ocean trench

The broad, flat part of the deep-ocean basin is called the ____________.
a) continental shelf
b) abyssal plain
c) continental rise
d) ocean trench

The deep ocean basin consists of what features?
a) abyssal plain, mid-ocean ridges, ocean trenches, rift valleys, plateaus
b) abyssal plain, mid-ocean ridges, seamounts, rift valleys, continental slope
c) abyssal plain, mid-ocean ridges, ocean trenches, seamounts, mountain valleys
d) abyssal plain, mid-ocean ridges, ocean trenches, seamounts, rift valleys

Desalination is the process of removing ____________ from ocean water.
a) pollution
b) living organisms
c) nodules
d) salt

Why is the ocean water off the coast of Brazil saltier than ocean water off the coast of Greenland?
a) climate
b) marine life
c) ocean pollution
d) deep ocean currents

What is an ocean trench?
a) A valley formed in a rift zone.
b) A submerged mountain.
c) A large crack that runs parallel to a chain of volcanic islands along a subduction zone.
d) Is at least 1,000 m deep.

What are the two major regions of the ocean floor?
a) continental margin and mid-ocean ridge
b) seamount and deep-ocean basin
c) continental margin and deep-ocean basin
d) rift valley and continental margin

What is the most abundant dissolved salt in ocean water?
a) sodium saline
b) sodium flouride
c) sodium chloride
d) sodium chlorine

Which of the following could become a volcanic island?
a) a tectonic plate
b) a seamount
c) an ocean trench
d) a rift valley

What technologies do scientists use to study the ocean floor?
a) Scuba and SONAR
b) SONAR and echo-ranging
c) satellite and Geosat
d) SONAR and satellites

The world's smallest ocean.
a) Indian Ocean
b) Arctic Ocean
c) Atlantic Ocean
d) Pacific Ocean

Which ocean extends from the coast of Antarctica to 60 degrees South Latitude?
a) Southern ocean
b) Arctic Ocean
c) Indian Ocean
d) Pacific ocean

What affects the ocean's surface temperature?
a) longitude and latitude
b) salinity and latitude
c) latitude and season (time of year)
d) salinity and moon phases

Surface ocean currents such as the Gulf Stream...
a) move warm water from higher latitudes (poles) to lower latitudes (tropics).
b) transport many times more water than all the rivers in the world.
c) are formed in parts of the ocean where water density is great.
d) move in straight paths across the oceans.

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