Environmental Science MCQs

✅ The correct answer is option B.
Lake stratification is the separation of lakes into three layers: Epilimnion: the top of the lake. Metalimnion (or thermocline): the middle layer, which may change depth throughout the day. Hypolimnion: the bottom layer.

✅ The correct answer is option A.
Commensalism – an association between two organisms in which one benefits and the other derives neither benefit nor harm. It does not promote coevolution.

✅ The correct answer is option B.
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts.

✅ The correct answer is option C.
This is used as an index for fuel consumption heating degree-days.

✅ The correct answer is option A.
Approximately, 50% of total world species are present on tropical rain forest.

✅ The correct answer is option A.
A lake is formed due to the collection of water in a natural basis or depression in a mountainous area or in plains.

✅ The correct answer is option A.
This is radiative equilibrium, energy balance. The temperature at which this occurs is about 0 F. That is called the temperature of radiative equilibrium. You might remember this is the figure for global annual average surface temperature on the earth without the greenhouse effect.

✅ The correct answer is option C.
Pond is the simplest aquatic ecosystems. Most ponds become dry after the rain over and are covered by terrestrial plants for the rest of the year. When the ponds fills in the monsoon season, a large number of food chains formed in the pond ecosystems.

✅ The correct answer is option D.
Dew point is a good indicator of the air’s actual water vapour content, unlike relative humidity, which takes the air’s temperature into account. High dew point indicates high water vapour content; low dew point indicates low water vapour content.

✅ The correct answer is option B.
Deforestation, clearance, clearcutting or clearing is the removal of a forest or stand of trees from land which is then converted to a non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests.