Multiple choice

Which layer of Earth's crust is known as soil?

  1. Deepest layer

  2. Upper layer

  3. Mid layer

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soil forms the uppermost layer of the Earth's crust, typically ranging from a few centimeters to several meters deep. It is the layer where biological activity, organic matter accumulation and weathering processes are most active. The deeper layers consist of consolidated rock materials without the organic complexity that characterizes soil.

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