Sea Level Changes
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Questions and Answers

Which landform feature helps stabilize the ocean beach during stormy times?

  • Low marshes
  • Salt marshes
  • Dune grasses (correct)
  • Barrier flats
  • Which landform feature forms closer to the lagoon on a barrier island?

  • Salt marshes (correct)
  • Barrier flats
  • Dune grasses
  • High marshes
  • What landform feature is formed by the deposition of sediment from a river into the ocean?

  • Deltas (correct)
  • Salt marshes
  • Barrier flats
  • Dune grasses
  • Which body of water is typically found between a barrier island and the mainland?

    <p>Saltwater lagoon (D)</p> Signup and view all the answers

    Where are barrier islands commonly found in the United States?

    <p>Gulf coast (C)</p> Signup and view all the answers

    What is the purpose of barrier islands in protecting the coastline?

    <p>To act as a buffer against erosion (C)</p> Signup and view all the answers

    Which river flows into the Mediterranean Sea?

    <p>Nile River (C)</p> Signup and view all the answers

    What is the main cause of the erosion of the Nile Delta?

    <p>Impeded flow of sediment (B)</p> Signup and view all the answers

    What is the term used to describe the blocking of sand supply to beach compartments?

    <p>Sand starvation (A)</p> Signup and view all the answers

    Which event is associated with the rise of sea levels during ice ages?

    <p>Melting of glaciers (C)</p> Signup and view all the answers

    What causes the thermal expansion of the oceans during interglacial periods?

    <p>Warming of the atmosphere (A)</p> Signup and view all the answers

    How much would sea levels rise if all the remaining ice on Earth melted?

    <p>230 feet (B)</p> Signup and view all the answers

    Which of the following is NOT a reason for changes in sea level over geologic time?

    <p>Decrease in mid-ocean ridge activity (B)</p> Signup and view all the answers

    During an ice age, what happens to the land due to the weight of glaciers?

    <p>The land sinks (A)</p> Signup and view all the answers

    Which region is currently experiencing sea level fall due to crustal rebound?

    <p>Norway (D)</p> Signup and view all the answers

    Which of the following is a major type of stabilization structure mentioned in the text?

    <p>Groins (D)</p> Signup and view all the answers

    What is the purpose of a groin?

    <p>To interfere with the longshore current (C)</p> Signup and view all the answers

    What happens to the sand on the side of a groin where the longshore current runs into it?

    <p>It erodes away (A)</p> Signup and view all the answers

    What is the purpose of a breakwater?

    <p>To protect homes or businesses (A)</p> Signup and view all the answers

    What is the purpose of a sea wall?

    <p>To protect homes or businesses (B)</p> Signup and view all the answers

    What is beach replenishment?

    <p>The process of adding sand to a beach that has eroded (C)</p> Signup and view all the answers

    What is the purpose of relocation in coastal areas?

    <p>To save buildings from storm surge and hurricanes (D)</p> Signup and view all the answers

    Why does salinity vary a lot in coastal waters?

    <p>Due to the mixing of fresh water and seawater (B)</p> Signup and view all the answers

    What is the purpose of groins in coastal management?

    <p>To trap sand and prevent erosion (A)</p> Signup and view all the answers

    What is the effect of breakwaters on the beach?

    <p>They widen the beach and diminish it on the other side (B)</p> Signup and view all the answers

    Why are seawalls considered to be the worst type of stabilization structure?

    <p>They concentrate wave energy towards the beach (A)</p> Signup and view all the answers

    Which type of estuary forms as sea level rises and floods existing river valleys?

    <p>Coastal plain estuaries (A)</p> Signup and view all the answers

    What causes the freshwater dumped into the ocean to curve to the right?

    <p>Coriolis effect (A)</p> Signup and view all the answers

    Which region is known for having fjord estuaries?

    <p>New Zealand (C)</p> Signup and view all the answers

    Which of the following is NOT a type of estuary mentioned in the text?

    <p>Drowned river mouth estuary (D)</p> Signup and view all the answers

    What is the main reason estuaries are threatened?

    <p>Human population growth (D)</p> Signup and view all the answers

    Why are estuaries important?

    <p>They are breeding grounds for marine animals (C)</p> Signup and view all the answers

    Which latitude is known for having coastal waters with uniform temperatures?

    <p>Equator (D)</p> Signup and view all the answers

    What can cause an increase in salinity in coastal waters?

    <p>Evaporation (D)</p> Signup and view all the answers

    What is the term for water that is well mixed throughout the entire water column and has the same temperature?

    <p>Isothermal water (C)</p> Signup and view all the answers

    Which river flows into the Chesapeake Bay and contributes to anoxic waters?

    <p>The Susquehanna River (D)</p> Signup and view all the answers

    What causes the depletion of dissolved oxygen in the water during algal blooms?

    <p>Bacterial decomposition (D)</p> Signup and view all the answers

    Which organisms in the Chesapeake Bay are significantly harmed by oxygen depletion in the water?

    <p>Blue crabs and oysters (D)</p> Signup and view all the answers

    What is the environmental issue related to harmful algal blooms in Florida?

    <p>Enriched waters from Lake Okeechobee (A)</p> Signup and view all the answers

    What are lagoons and what are the three zones found in them?

    <p>Shallow water bodies with fresh, transitional, and salt water zones (A)</p> Signup and view all the answers

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