Question

Sort the layers of soil from top to bottom.

• A. Top soil
• B. Subsoil
• C. Parent rock
• D. Bedrock

Answer 1

Based on the texture, colour, depth and chemical composition soil has different layers.
$\bullet$ Uppermost layer is the top soil which is soft and porous. It is rich in humus.
$\bullet$ Second layer is the subsoil which is hard and compact. It is rich in minerals.
$\bullet$ Third layer is parent rock which is made of lumps of rocks with cracks and crevices.
$\bullet$ Bottom-most layer is bedrock which is the hardest layer. It is very difficult to dig this layer with a spade.