Question

Physical resources: Air, Water, Soil. Air for respiration, for combustion, for moderating
temperatures; movements of air and its role in bringing rains across India.
Air, water and soil pollution (brief introduction).Holes in ozone layer and the probable damages.
Bio-geo chemical cycles in nature: Water, Oxygen, Carbon and Nitrogen

Answer 1

Solution

Rational Number : A rational number is a fractional number which is in the form of a p/q , where q is ≠ 0.

Some examples are 2/5,3/6,7/8 , 2/3, 2/9 and so on.

Here , see the denominator 5,6,8,9 &3 all are >0

=>Rational number can be further converted into decimal form e.g., 1/2= 0.5

Learn more:

TypesReal Numbers ( real numbers includes all the integers )Natural NumbersWhole Numbers

Standard form of Rational Number:

Rational number having fractional values with no common factor between dividend and divisor and Divisor be positive.

e.g., 12/36= 2/6= 1/3

Answer 2

Explanation:

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