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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