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

What is weathering in the context of rivers?

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

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

<p>Speed of the river (D)</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 (C)</p> Signup and view all the answers

Where are glaciers typically found on Earth?

<p>In the coldest parts of Earth (B)</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 (C)</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 (A)</p> Signup and view all the answers

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