Exam 3 - Eas 2600

50 Questions | Total Attempts: 21

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Exam 3 - Eas 2600

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Questions and Answers
  • 1. 
    Which of the following statements about groundwater in coastal regions is TRUE?
    • A. 

      Seawater is denser than fresh water; therefore, fresh groundwater floats on top of salty groundwater.

    • B. 

      Fresh water is denser than seawater; therefore, fresh groundwater floats on top of salty groundwater.

    • C. 

      Seawater is denser than fresh water; therefore, salty groundwater floats on top of fresh groundwater.

    • D. 

      Fresh water is denser than seawater; therefore, salty groundwater floats on top of fresh groundwater.

  • 2. 
    Which soil horizon consists primarily of slightly altered, weathered bedrock?
    • A. 

      The C-horizon

    • B. 

      The A-horizon

    • C. 

      The B-horizon

    • D. 

      None of the above

  • 3. 
    Groundwater in agricultural areas may contain high quantities of _______ because of fertilizers.
    • A. 

      Sodium

    • B. 

      Calcium

    • C. 

      Lead

    • D. 

      Nitrate

  • 4. 
    What causes the deep red color of soils found in Georgia and other warm, humid regions?
    • A. 

      Iron oxides

    • B. 

      Quartz

    • C. 

      Feldspar

    • D. 

      Clay minerals

  • 5. 
    Which of the following terms describes the largest particle that can be carried by a stream?
    • A. 

      Discharge

    • B. 

      Capacity

    • C. 

      Viscosity

    • D. 

      Competence

  • 6. 
    The accumulation of rocks at the base of a cliff is called ______.
    • A. 

      An alluvial fan

    • B. 

      Soil creep

    • C. 

      Talus

    • D. 

      A dune

  • 7. 
    According to Darcy's law, which of the following aquifers will have the greatest rate of groundwater flow?
    • A. 

      An aquifer with low hydraulic conductivity and a high hydraulic gradient

    • B. 

      An aquifer with low hydraulic conductivity and a low hydraulic gradient

    • C. 

      An aquifer with high hydraulic conductivity and a low hydraulic gradient

    • D. 

      An aquifer with high hydraulic conductivity and a high hydraulic gradient

  • 8. 
    Physical weathering is greatest at ________.
    • A. 

      Low latitudes

    • B. 

      Gentle slopes

    • C. 

      High latitudes

    • D. 

      All of the above

  • 9. 
    The topographic ridge between two streams is called a _________.
    • A. 

      Trellis

    • B. 

      Divide

    • C. 

      Valley

    • D. 

      Point bar

  • 10. 
    For most rivers, discharge __________ downstream.
    • A. 

      Remains constant

    • B. 

      Decreases slightly

    • C. 

      Decreases greatly

    • D. 

      Increases

  • 11. 
    At a bend in a river, ______ occurs on the outside of the bend and ______ occurs on the inside of the bend.
    • A. 

      Deposition, erosion

    • B. 

      Erosion, erosion

    • C. 

      Erosion, deposition

    • D. 

      Deposition, deposition

  • 12. 
    One of the most effective mechanisms for physical weathering is __________.
    • A. 

      Hydration

    • B. 

      Frost wedging

    • C. 

      Oxidation

    • D. 

      Hydrolysis

  • 13. 
    Which of the following processes is not an example of chemical weathering?
    • A. 

      Splitting of a rock along a fracture

    • B. 

      Dissolution of calcite

    • C. 

      Rusting of a nail

    • D. 

      Breakdown of feldspar to form kaolinite

  • 14. 
    At any point in a river, the equilibrium between erosion of the streambed and sedimentation in the channel is controlled by ___________.
    • A. 

      Stream flow

    • B. 

      Topography

    • C. 

      Climate

    • D. 

      All of the above

  • 15. 
    Which of the following minerals is most likely to form a clay mineral during weathering?
    • A. 

      Iron pyroxene (Fe2Si2O6)

    • B. 

      Calcite (CaCO3)

    • C. 

      Quartz (SiO2)

    • D. 

      Feldspar (KAlSi3O8)

  • 16. 
    The hydraulic gradient is the ratio between the
    • A. 

      Influx and outflow of water in an aquifer.

    • B. 

      Elevation difference and the flow distance in an aquifer.

    • C. 

      Porosity and permeability of an aquifer.

    • D. 

      Permeability and elevation difference in an aquifer.

  • 17. 
    Which of the following minerals is most stable at the Earth's surface?
    • A. 

      Olivine (MgFe)2SiO4)

    • B. 

      Pyroxene (MgFeSi2O6)

    • C. 

      Mica (KAl2(AlSi3O10)(OH)2)

    • D. 

      Hematite (Fe2O3)

  • 18. 
    Suspended load includes all material ___________.
    • A. 

      Temporarily or permanently suspended in the flow

    • B. 

      Rolling along the bottom and suspended in the flow

    • C. 

      Rolling along the bottom of the stream

    • D. 

      Deposited on the bottom of the stream

  • 19. 
    In a soil profile, organic matter is found __________.
    • A. 

      Primarily in the A-horizon

    • B. 

      Primarily in the B-horizon

    • C. 

      Primarily in the C-horizon

    • D. 

      In the A-, B-, and C-horizons in approximately equal amounts

  • 20. 
    What is the difference between the saturated and unsaturated zones of groundwater?
    • A. 

      The pore spaces in the saturated zone are full of water; the pore spaces in the unsaturated zone are not full of water.

    • B. 

      The pore spaces in the saturated zone are not full of water; the pore spaces in the unsaturated zone are full of water.

    • C. 

      The saturated zone has a lower porosity than the unsaturated zone.

    • D. 

      The saturated zone has a higher porosity than the unsaturated zone.

  • 21. 
    Which of the following terms describes the total sediment load carried by a stream?
    • A. 

      Discharge

    • B. 

      Viscosity

    • C. 

      Competence

    • D. 

      Capacity

  • 22. 
    _______ is the process whereby sand grains jump along the streambed during transport.
    • A. 

      Hydrolosis

    • B. 

      Saltation

    • C. 

      Meandering

    • D. 

      Superposition

  • 23. 
    Acids enhance chemical weathering. What is the most common natural acid on the Earth's surface?
    • A. 

      Hydrochloric acid

    • B. 

      Nitric acid

    • C. 

      Sulfuric acid

    • D. 

      Carbonic acid

  • 24. 
    Why are sand-sized particles easier to erode than clay-sized particles?
    • A. 

      Because clay particles are denser than sand particles, making them heavier

    • B. 

      Because sand grains are rounder and roll more easily, whereas clay particles are flat and platy

    • C. 

      Because clay particles are attracted to each other due to opposite charges, which hold them in place

    • D. 

      Because sand grains are typically made of quartz, which saltates more easily than clay particles

  • 25. 
    Which of the following will decrease the rate of chemical weathering of a rock at the Earth's surface?
    • A. 

      Decreasing the temperature

    • B. 

      Breaking the rock into smaller pieces

    • C. 

      Increasing the amount of surrounding soil

    • D. 

      Increasing the amount of acid in the rainwater

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