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Seventh Grade (Grade 7) Oceanography and Hydrology Questions

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Grade 7 Oceanography and Hydrology
What is the process that continually adds new material to the ocean floor called?
  1. continental drift
  2. subduction
  3. seafloor spreading
  4. earthquakes
Grade 7 Oceanography and Hydrology
The zone in the ocean where the temperature changes rapidly is called the
  1. surface zone.
  2. benthos.
  3. tide zone.
  4. thermozone.
  5. thermocline.
Grade 7 Oceanography and Hydrology
A(n)                is a body of water that usually forms behind a dam.
  1. reservoir
  2. water table
  3. aquifer
  4. watershed
Grade 7 Oceanography and Hydrology
A V-shaped valley on the ocean floor, where old floor is subducted, is                           .
  1. a peninsula
  2. an undersea mountain chain
  3. a trench
  4. a delta
Grade 7 Oceanography and Hydrology
Earth's hydrosphere is best described as
  1. the relatively thin layer of rock found above Earth's mantle.
  2. the hot liquid rock located in Earth's outer core.
  3. the very dense rock located in Earth's inner core.
  4. all of Earth's water.
Grade 7 Oceanography and Hydrology
Where does seafloor spreading take place?
  1. convergent boundaries
  2. transform boundaries
  3. oceanic volcanoes
  4. mid-ocean ridges
Grade 7 Oceanography and Hydrology
The hydrosphere relates to water.
  1. True
  2. False
Grade 7 Oceanography and Hydrology
Tides are caused mainly by
  1. Earth's rotation on its axis, which causes water to move.
  2. differences in how much the Sun pulls on different parts of Earth.
  3. strong winds blowing water onto coasts.
  4. differences in how much the Moon pulls on different parts of Earth.
Grade 7 Oceanography and Hydrology
Microorganisms in the ocean that produce half the worlds oxygen are called                .
  1. plankton.
  2. zooplankton.
  3. phytoplankton.
  4. microplankton.
Grade 7 Oceanography and Hydrology
Glaciers are
  1. lateral moraines.
  2. terminal moraines.
  3. rocks and water.
  4. moving rivers of ice.
Grade 7 Oceanography and Hydrology
The most abundant salt in the ocean is
  1. magnesium bromide.
  2. calcium fluoride.
  3. calcium carbonate.
  4. sodium chloride.
Grade 7 Oceanography and Hydrology
Giant sea waves caused by earthquakes on the ocean floor are called
  1. faults.
  2. seismograms.
  3. volcanoes.
  4. tsunamis.
Grade 7 Oceanography and Hydrology
What erupts through the valley of the mid-ocean ridge?
  1. molten material
  2. the lithosphere
  3. deep-ocean trenches
  4. continental drift
Grade 7 Oceanography and Hydrology
Without the ocean global conveyor of warm and cold currents, Earth's climate
  1. would become drastically different.
  2. wouldn't change at all.
  3. would change very little.
Grade 7 Oceanography and Hydrology
A deep valley along the ocean floor beneath with oceanic crust slowly sinks into the mantle is called                   .
  1. deep ocean trench
  2. rift valley
  3. transform boundary
  4. mid-ocean ridge
Grade 7 Oceanography and Hydrology
The diagram shows water flow in a meandering river channel. Which of the following best explains why water flows in the river channel?
Meandering River
  1. gravitational force
  2. energy from the Sun
  3. differences in water salinity
  4. energy from Earth’s interior
Grade 7 Oceanography and Hydrology
The amount of dissolved salts in ocean water is called                .
  1. salinity
  2. turbidity
  3. upwelling
  4. current
Grade 7 Oceanography and Hydrology
Detection buoys help monitor the oceans for potential tsunamis. Which best describes what the buoys monitor?
  1. changes in sea level
  2. changes in water chemistry
  3. changes in animal migration
  4. changes in weather patterns
Grade 7 Oceanography and Hydrology
Which of the following choices are warning signs of a tsunami?
  1. Earthquake
  2. Falling and rising water levels
  3. Volcano eruptions
  4. Meteorite impact
  5. All the above
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