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Eighth Grade (Grade 8) Oceanography and Hydrology Questions

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Grade 8 Oceanography and Hydrology
Semidiurnal tides cause ocean water levels to rise and fall every
  1. 6 hours.
  2. 10.5 hours.
  3. 12.5 hours.
  4. 24 hours.
Grade 8 Oceanography and Hydrology
Mild temperatures found in Northern and Western Europe can be attributed to which of the following?
  1. Labrador Current
  2. The Gulf Stream
  3. Equatorial Current
  4. Greenhouse Effect
Grade 8 Oceanography and Hydrology
Matter that settles to the bottom of a liquid is called                .
  1. deposits
  2. strata
  3. sediment
  4. stuff
Grade 8 Oceanography and Hydrology
What causes high and low tides in the ocean?
  1. the amount of rain that falls
  2. gravity interacting between Earth and the Moon
  3. movement of the wind
Grade 8 Oceanography and Hydrology
What is a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle?
  1. deep-ocean trench
  2. rift valley
  3. subduction zone
  4. seafloor spreading
Grade 8 Oceanography and Hydrology
The process by which molten material adds new oceanic crust to the ocean floor is called
  1. organic rock.
  2. mid-ocean ridge.
  3. rock cycle.
  4. seafloor spreading.
Grade 8 Oceanography and Hydrology
Harper is doing a research paper about the drought in the Southwest United States. She learns that the Colorado River Basin has experienced over a decade of drought. Water storage for the region is at about half its capacity. Satellite imaging shows that over three-quarters of the water lost from the river basin came from groundwater. Which would be the best explanation about the drought for Harper to include in her paper?
  1. Water is a renewable resource that can always be replaced within a human lifetime.
  2. Water is a nonrenewable resource and can never be replaced within a human lifetime.
  3. Water in the river basin is being lost at a faster rate than can be naturally replaced through the water cycle.
  4. Water in the river basin is being replaced naturally through the water cycle at a faster rate than it is being lost.
Grade 8 Oceanography and Hydrology
Permeable materials allow water to easily flow through them. Which of the following is the most permeable material?
  1. sediment with large pore spaces that connect together
  2. sediment with small pore spaces that connect together
  3. sediment with large pore spaces that do not connect together
  4. sediment with small pore spaced that do not connect together
Grade 8 Oceanography and Hydrology
Which is a way sediment enters rivers and streams?
  1. Subduction
  2. Erosion
  3. Waves
  4. Compaction
Grade 8 Oceanography and Hydrology
What branch of Earth Science that requires the use of miniature research submarines?
  1. Geology
  2. Astronomy
  3. Oceanography
  4. Meteorology
Grade 8 Oceanography and Hydrology
In the ocean, this is any movement of material that results from differences in density.
  1. Convection current
  2. Upwelling
  3. Surface current
  4. Coriolis Effect
Grade 8 Oceanography and Hydrology
The rising and falling of the ocean is called a                .
  1. winds
  2. tide
  3. wave height
  4. low tide
Grade 8 Oceanography and Hydrology
How often do spring and neap tides each occur?
  1. once a month
  2. twice a month
  3. once every week
  4. twice per year
Grade 8 Oceanography and Hydrology
Most of the ocean's waves are caused by                .
  1. stack
  2. trough
  3. tsunamis
  4. wind
Grade 8 Oceanography and Hydrology
What is a porous rock layer underground that is a reservoir for water?
  1. stream
  2. groundwater
  3. aquifer
  4. surface water
Grade 8 Oceanography and Hydrology
When plant leaves give off water vapor this is called                .
  1. condensation
  2. transpiration
  3. precipitation
  4. evaporation
Grade 8 Oceanography and Hydrology
Molecules of water vapor in the air become liquid water in the process of                .
  1. evaporation
  2. condensation
  3. melting
  4. humidity
Grade 8 Oceanography and Hydrology
Semi-enclosed area where the fresh water from a river meets salty water from the sea.
  1. aquifer
  2. ocean
  3. estuary
  4. wetland
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