Environmental Science MCQs

✅ The correct answer is option C.
“A good absorber of a given wavelength of radiation is also a good emitter of that wavelength.” This is a statement of Kirchoff’s Law.

✅ The correct answer is option A.
The amount of solar radiation reaching the surface of the earth is called Solar flux.

✅ The correct answer is option A.
Clouds form when moist, warm rising air cools and expands in the atmosphere. The water vapor in the air condenses to form tiny water droplets which are the basis of clouds.

✅ The correct answer is option A.
Water vapour is considered a variable gas in the earth’s atmosphere.

✅ The correct answer is option D.
All the above contribute to displacement.

✅ The correct answer is option E.
Condensation nuclei are tiny particles in the air on which water vapyor condenses and they are the key to making clouds, fog, haze, rain, and other forms of precipitation.

✅ The correct answer is option E.
Our seasons are caused by the angle at which sunlight reaches the earth and the length of the daylight hours.

✅ The correct answer is option A.
The first trophic level of the food chain is always occupied by green plants which are termed to be producers. This is because producers absorb sunlight, abiotic factor and fix it into food chain. This energy is transferred to organisms in other trophic levels of the food chain.

✅ The correct answer is option B.
The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth, although its thickness varies seasonally and geographically. The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson.

✅ The correct answer is option A.
Nilgiri Biosphere Reserve located in Tamil Nadu, Kerala and Karnataka was the first biosphere reserve established in 1986.