Understanding Erosion: Causes, Effects, and Prevention Methods
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Questions and Answers

What is the main cause of topsoil loss in rill erosion?

  • Water carrying away topsoil in impromptu streams (correct)
  • Water acting like a broom to clear out topsoil in a whole area
  • Water sapping away the topsoil near water bodies
  • Wind gusts blowing away unsecured soil

How can erosion affect the taste of fish like catfish?

  • By causing runoff downstream
  • By making the water full of germs
  • By washing away man-made fertilizers
  • By making the fish taste like mud due to topsoil in water (correct)

Why do most farmers opt for using expensive fertilizers after losing topsoil?

  • To fix sheet erosion issues
  • To make up for fertile topsoil lost (correct)
  • To prevent bank erosion
  • To enhance the growth of shrubs

What is the primary reason that erosion becomes a problem according to the text?

<p>Absence of vegetation to hold soil in place (D)</p> Signup and view all the answers

What technique involves planting crops in long rows with alternating bands to prevent topsoil loss?

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

Why are slopes particularly vulnerable to erosion according to the text?

<p>'Water can run quickly downhill on a slope' (B)</p> Signup and view all the answers

'Sheet erosion' primarily affects a whole area by which method?

<p>'Water acting like a broom to clear out the topsoil' (C)</p> Signup and view all the answers

'Bank erosion' occurs when which factor saps away topsoil near water bodies?

<p>'Bodies of water' (B)</p> Signup and view all the answers

What is soil erosion?

<p>The process by which topsoil is removed (C)</p> Signup and view all the answers

Which part of soil is about the consistency of ashes?

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

Why does clay turn to paste when water is added?

<p>Due to its tiny particle size and lack of space for water movement (D)</p> Signup and view all the answers

What happens when excess water is added to sand?

<p>It drains out easily along with nutrients (D)</p> Signup and view all the answers

Why is topsoil a crucial part of soil composition?

<p>It contains a mix of sand, clay, silt, and organic materials important for plant growth (C)</p> Signup and view all the answers

How does silt differ from sand and clay in terms of water retention?

<p>Silt retains water better than sand but not as well as clay (B)</p> Signup and view all the answers

What risk does excess water pose in terms of soil erosion?

<p>It leads to the removal of topsoil through erosion (B)</p> Signup and view all the answers

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