Lesson Worksheet: Lakes, Seas, and Oceans Geology

In this worksheet, we will practice describing the types of lake deposits, identifying the degradational and depositional effects of seas and oceans, and comparing depositional zones associated with different water depths.


True or False: Freshwater lakes contain coarse grains on their beaches and finer sediments in their centers.

  • ATrue
  • BFalse


What are the sediments in Wadi El-Natron Lake composed of?

  • AGypsum and halite
  • BGravel and sand
  • CClay and gravel
  • DSodium and magnesium carbonates


True or False: All beaches are sandy.

  • ATrue
  • BFalse


True or False: Sediments that are deposited in the abyssal zone are dominated by pebbles and coarse-grained sand.

  • ATrue
  • BFalse


Which types of sediments are found close to the beach in the shallow water zone?

  • AClay and sand
  • BGravel and clay
  • CGravel and silt
  • DGravel and sand


Which factor has the largest impact on the degradation effect of waves?

  • AThe temperature of the water
  • BThe power of the wind
  • CMarine organisms in surface waters
  • DThe salinity of the water


Which of the following microorganisms' remains can be found in sediments deposited in the bathyal zone but not in sediments deposited in the abyssal zone?

  • ASiliceous foraminifera
  • BRadiolaria
  • CSiliceous plankton
  • DDiatoms
  • ECalcareous foraminifera


True or False: The shallow water zone is defined as the zone having a water depth of 0 to 500 metres.

  • ATrue
  • BFalse


Which of the following statements about the shallow water zone is correct?

  • AIt represents the continental shelf area that extends from the beach to a depth of 200 metres.
  • BDepositional environments include beaches, spits, and barriers.
  • CSedimentation is dominated by the deposition of foraminifera and diatoms.
  • DIt represents the continental slope area and extends from a water depth of 200 metres to 2‎ ‎000 metres.


True or False: Once a sediment has been deposited at a river mouth, it can no longer be transported.

  • ATrue
  • BFalse

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