Environmental Science MCQs

✅ The correct answer is option B.
Temperature is a measure of the average speed of all of the molecules in a substance (gas, liquid, or solid). The higher the air temperature, the faster the air molecules move.

✅ The correct answer is option C.
To begin with, it shows that more than half (58%) of the total energy produced in the US is wasted due to inefficiencies, such as waste heat from power plants, vehicles, and light bulbs. In other words, the US has an energy efficiency of 42%.

✅ The correct answer is option B.
The United Nations Conference on Environment and Development (UNCED), also known as the Rio de Janeiro Earth Summit, the Rio Summit, the Rio Conference, and the Earth Summit (Portuguese: ECO92), was a major United Nations conference held in Rio de Janeiro from 3 to 14 June in 1992.

✅ The correct answer is option C.
Forms blood and bone (leads to complex internal organs).

✅ The correct answer is option C.
Bahuguna is also known for coining the Chipko slogan ‘ecology is permanent economy’.

✅ The correct answer is option E.
Volcanoes also give off greenhouse gases. The most abundant gas released from volcanic eruptions is water vapour. Other emitted gases include carbon dioxide (CO2), sulfur dioxide (SO2), hydrogen sulfide (H2S), carbon monoxide (CO), hydrogen chloride (HCl), and hydrogen fluoride (HF).

✅ The correct answer is option A.
The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.

✅ The correct answer is option C.
Ecology is the study of the relationships between living organisms, including humans, and their physical environment; it seeks to understand the vital connections between plants and animals and the world around them.

✅ The correct answer is option B.
The Green Revolution in India refers to a period of time when agriculture in India changed to an industrial system due to the adoption of modern methods and technology such as high yielding variety (HYV) seeds, tractors, pump sets, etc. Green revolution was started by Dr. M.S. Swaminathan.

✅ The correct answer is option D.
An autotroph or primary producer is an organism that produces complex organic compounds using carbon from simple substances such as carbon dioxide, generally using energy from light or inorganic chemical reactions.