River Formation and Characteristics
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Questions and Answers

What is the primary cause of a river's water flow?

  • The slope of the riverbed (correct)
  • The joining of other rivers
  • The width of the river's valley
  • The river's sediment deposits

    • What happens as a river nears its mouth?

  • The river widens and its flow increases
  • The river slows down and drops sediment (correct)
  • The river narrows and its flow decreases
  • The river picks up more sediment from erosion

    • What is a delta?

  • A narrow valley through which a river flows
  • A large area of flat land formed by sediment deposits (correct)
  • A steep slope at the river's source
  • A tributary joining the main river

    • Which of the following is a positive effect of flooding?

    <p>Depositing nutrient-rich sediment on floodplains</p> Signup and view all the answers

    What is weathering in the context of rivers?

    <p>The breaking down of rocks into smaller pieces</p> Signup and view all the answers

    What is the primary cause of a flash flood?

    <p>Heavy rainfall in a short period of time</p> Signup and view all the answers

    What is the process of moving weathered rock and soil from one place to another called?

    <p>Erosion</p> Signup and view all the answers

    What factor can affect the rates of weathering, erosion, and deposition?

    <p>Speed of the river</p> Signup and view all the answers

    What causes cracks in rocks to widen by the repeated freezing and thawing process?

    <p>Water expanding when it freezes</p> Signup and view all the answers

    Where are glaciers typically found on Earth?

    <p>In the coldest parts of Earth</p> Signup and view all the answers

    How do glaciers contribute to erosion?

    <p>By pushing broken rock pieces under and on top of them</p> Signup and view all the answers

    What happens when liquid water becomes ice due to temperature drop?

    <p>It expands and widens cracks in rocks</p> Signup and view all the answers

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