Multiple choice

What does not happen to topsoil when it erodes?

  1. the nutrients of the topsoil are depleted

  2. CO2 levels can increase because stored carbon is released

  3. eroded topsoil ends up as sediment in water & can kill fish

  4. the eroded layers quickly restore themselves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Topsoil formation is an extremely slow geological process. Once topsoil is eroded, it does not restore itself quickly; it can take hundreds or thousands of years to replace.

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