Environmental Science MCQs

✅ The correct answer is option C.
Organisms are characterized into two broad categories based upon how they obtain their energy and nutrients: autotrophs and heterotrophs. Autotrophs are known as producers because they are able to make their own food from raw materials and energy. Examples include plants, algae, and some types of bacteria. Organisms which depend on Producers for nutrition are called heterotrophs or consumers.

✅ The correct answer is option C.
Harnessing of nuclear energy often causes thermal pollution.

✅ The correct answer is option A.
The CFCs, when released into the atmosphere, react with UV rays to form chlorine atoms which destroy the ozone layer and results in the thinning out of the ozone layer also known as the ozone hole.

✅ The correct answer is option A.
Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. … Nitrogen oxides can also be produced naturally by lightning strikes, and sulfur dioxide is produced by volcanic eruptions.

✅ The correct answer is option C.
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 A.
If the sun suddenly began emitting more energy, the earth’s radiative equilibrium temperature would increase.

✅ The correct answer is option A.
Slip erosion is also know as landslide. When earthquakes occur on areas with steep slopes, many times the soil slips causing landslides.

✅ The correct answer is option C.
At the North Pole the sun will rise above the horizon on March 21and set below the horizon on September 23.

✅ The correct answer is option D.
Freshwater protozoans react to a/an hypotonic environment by removing water through a contractile vacuole.

✅ The correct answer is option D.
Trophic levels in a food chain are formed by producers, consumers and decomposers. In the given food chain, plants are producers. The animals eating plants are called as primary consumers and animals eating primary consumers are called as secondary consumers.