Environmental Science MCQs

✅ The correct answer is option D.
About 23 percent of incoming solar energy is absorbed in the atmosphere by water vapour, dust, and ozone, and 48 percent passes through the atmosphere and is absorbed by the surface. Thus, about 71 percent of the total incoming solar energy is absorbed by the Earth system.

✅ The correct answer is option D.
All of the above are correct.

✅ The correct answer is option C.
A rain gauge (also known as an udometer, pluviometer, or an ombrometer) is an instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over an area in a predefined period of time.

✅ The correct answer is option A.
The tendency to maintain a stable, relatively constant internal environment is called homeostasis.

✅ The correct answer is option D.
Heating of the Earth surface due to radiation of the Sun trapped by carbon dioxide and water vapour in the atmosphere is called as Green house effect.

✅ The correct answer is option C.
Human population growth curve is a J shaped curve.

✅ The correct answer is option C.
The electromagnetic spectrum includes, from shortest wavelength to longest: Ultraviolet, visible, infrared.

✅ The correct answer is option A.
The pyramid of energy in terrestrial ecosystem is upright. Pyramid of biomass for terrestrial ecosystems (grasslands, forests) the biomass generally decreases at each higher trophic level from plants via herbivores to carnivores.

✅ The correct answer is option D.
UV radiations is injurious to plants because it causes genetic changes.

✅ The correct answer is option B.
BOD (Biological Oxygen Demand or Biochemical Oxygen Demand) is the amount of dissolved oxygen, expressed in milligrams of oxygen per litre of water, consumed by micro-organisms to decompose the organic matter present in water.