Question

Give geographical reasons of every following statements
1. Anthracite is a very good quality coal.
2. Crop rotation retains soil fertility.
3. Petroleum is referred as ‘black gold’.

Answer 1

Answer:

1: It it's the best quality of coal as it has the maximum number of carbon content.

2: it retains soil fertility as one crop fulfills the need of nutrients of the other

3:is referred to as Black gold because it is very valuable and is black in colour when taken out from the ground.

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Answer 2

3.The Petroleum is called black gold because when the crude oil is extracted from the soil below, it is black in colour. Petroleum is very expensive like gold. Comparing its high value with gold in terms of properties and moneywise; it is regarded as black gold.

2.Changing crops on a regular basis maintain the fertility of the soil because not all of the same nutrients are used continusely in every season.