Question

1. (a) Define the following terms:
(i) Aphelion
(i) Hazardous substances
(ii) Micronutrients
(iv) Pneumoconiosis (dust a
(dust diseases)
(v) Organic farming
​

Answer 1

1. aphelion:- the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun.
2. hazardous substance:-Hazardous substances and dangerous goods. ... Key point: A hazardous substancecan be any substance, whether solid, liquid or gas, that may cause harm to your health. Hazardous substances are classified on the basis of their potential health effects, whether acute (immediate) or chronic (long-term).
3. micronutrients:- a chemical element or substance required in trace amounts for the normal growth and development of living organisms.
6. organic farming:- Organic farming is an alternative agricultural system which originated early in the 20th century in reaction to rapidly changing farming practices. Organic farming continues to be developed by various organic agriculture organizations today.