Rivers and Ecosystems Quiz
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Questions and Answers

What is the term for the area where freshwater from a river mixes with salty seawater?

  • Estuary (correct)
  • Delta
  • Gorge
  • Floodplain
  • Which structure helps prevent flooding by acting as an embankment along a river?

  • Meander
  • Mouth
  • Levee (correct)
  • Tributary
  • What is formed by sediment deposits at the mouth of a river?

  • Confluence
  • Delta (correct)
  • Riverbank
  • Channel
  • Which of the following terms describes a U-shaped lake formed when a river meander is cut off?

    <p>Oxbow Lake (C)</p> Signup and view all the answers

    What is known as the place where two rivers converge?

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

    What defines the high land that separates two river basins?

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

    Which term refers to the bottom of a river where the water flows?

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

    What type of ecosystem is characterized by organisms living on or in the riverbed?

    <p>Benthic Ecosystem (B)</p> Signup and view all the answers

    Which feature is formed from sediment deposits at the mouth of a river?

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

    What defines the 'watershed' in relation to a river system?

    <p>The area where all water drains into a single river system (A)</p> Signup and view all the answers

    What characterizes a meander in a river?

    <p>A curve or bend in the river's path (A)</p> Signup and view all the answers

    What is the purpose of a levee in relation to rivers?

    <p>To prevent flooding (A)</p> Signup and view all the answers

    Which component of a river ecosystem is specifically characterized by the presence of bacteria?

    <p>Microbial Ecosystem (B)</p> Signup and view all the answers

    What type of landscape feature results from river erosion over time?

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

    Which term is used for a smaller river that flows into a larger river?

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

    Flashcards

    Source

    The beginning of a river, usually found in mountains or highlands.

    Tributary

    A smaller river or stream that joins a larger river.

    Meander

    A curve or bend in a river's path, often in the middle course.

    Floodplain

    Flat land around a river that may flood during heavy rains.

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    Delta

    Landform created by sediment deposits at a river's mouth.

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    Estuary

    Area where freshwater from the river mixes with salty seawater.

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    Oxbow Lake

    A U-shaped lake formed when a river's meander is cut off.

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    Levee

    An embankment along a river that prevents flooding.

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    Channel

    The path that a river flows through.

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    Riverbank

    The land along the sides of a river.

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    Riverbed

    The bottom of the river where water flows.

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    Confluence

    The point where two rivers meet.

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    Watershed (Drainage Basin)

    The area of land that drains into a single river system.

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    Gorge

    A deep, narrow valley formed by river erosion over time.

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    Distributary

    A smaller river that branches off from the main river.

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    Plunge Pool

    A deep pool at the base of a waterfall, created by falling water.

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