Environmental Science MCQs

✅ The correct answer is option B.
The greenhouse effect is one of the main factors determining the temperature of a planet. It’s the phenomenon by which certain gases – so-called greenhouse gases – in the atmosphere trap heat that would otherwise escape to space, thereby keeping the planet warm.

✅ The correct answer is option B.
Noise of sound measurement is called decibels (dB).

✅ The correct answer is option B.

✅ The correct answer is option C.
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses. A cold front is a warm-cold air boundary with the colder air replacing the warmer.

✅ The correct answer is option A.
The uppermost branches of the trees in a forest, forming a more or less continuous layer of foliage.

✅ The correct answer is option A.
Decrease as the air becomes drier.

✅ The correct answer is option D.
An increase in temperature will cause condensation to occur is not correct.

✅ The correct answer is option D.
Soaps and detergent are the sources of both organic and inorganic pollutants. These pollutants harm the water bodies badly. The correct answer is D.

✅ The correct answer is option D.
Pollution is defined as the process of making land, water, air or other parts of the environment unfavorable for life by the introduction of a contaminant into a natural environment through human activities.

✅ The correct answer is option B.
About one-half of the meteorologists and atmospheric scientists in the United States work in the field of weather forecasting.