Question

Match the following:
$\begin{array}{cccc}& \text{Layer of Soil}& & \text{Properties}\\ \text{A.}& \text{Topsoil}& i& \text{Hardest layer}\\ \text{B.}& \text{Subsoil}& ii& \text{Lumps of rock}\\ \text{C.}& \text{Parent rock}& iii& \text{Soft and porous}\\ \text{D.}& \text{Bedrock}& iv& \text{Retains less water}\end{array}$

• A. A-iii; B-iv; C-i; D-ii
• B. A-iv; B-iii; C-ii; D-i
• C. A-ii; B-iii; C-iv; D-i
• D. A-iii; B-iv; C-ii; D-i

Answer 1

The correct option is D A-iii; B-iv; C-ii; D-i

Based on the texture, colour, depth and chemical composition soil has different layers.
$\begin{array}{cccc}& \text{Layer of Soil}& & \text{Properties}\\ \text{A.}& \text{Topsoil}& iii& \text{Soft and porous}\\ \text{B.}& \text{Subsoil}& iv& \text{Retains less water}\\ \text{C.}& \text{Parent rock}& ii& \text{Lumps of rock}\\ \text{D.}& \text{Bedrock}& i& \text{Hardest layer}\end{array}$

$\bullet$ Uppermost layer is top soil which is soft and porous. It is rich in humus.

$\bullet$ Second layer is 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.

$\bullet$ Last layer is bedrock which is the hardest layer. It is very difficult to dig this layer even with a spade.