Environmental Science MCQs

✅ The correct answer is option A.
In a pyramid of numbers, in a grassland ecosystem, the largest population is that of producers.

✅ The correct answer is option A.
Biogas differs from natural gas in that it is a renewable energy source produced biologically through anaerobic digestion rather than a fossil fuel produced by geological processes. Biogas is primarily composed of methane gas, carbon dioxide, and trace amounts of nitrogen, hydrogen, and carbon monoxide.

✅ The correct answer is option B.

✅ The correct answer is option A.
Temperature readings are taken in instrument shelters more than 5 feet above the ground.

✅ The correct answer is option B.
Endemic species are plants and animals that exist only in one geographic region. Species can be endemic to large or small areas of the earth: some are endemic to a particular continent, some to part of a continent, and others to a single island.

✅ The correct answer is option D.
Commonly used radioactive isotopes in scientific research 14 C, 125 I and 32 P.

✅ The correct answer is option B.
The first teak plantations were raised in Nilambur in 1842 by the British. H V Conolly, the Malabar District Collector during the British rule, was instrumental in planting teak in the entire Nilambur area, with the help of Chathu Menon, a forest officer. Now the plantation is named after Conolly.

✅ The correct answer is option A.
Rainwater harvesting has been a popular method of obtaining water for agriculture and for drinking purposes in rural homes. The legislation to promote rainwater harvesting was enacted through the Urban Development Authority (Amendment) Act, No. 36 of 2007.

✅ The correct answer is option D.
Energy is defined as the capacity to do work.

✅ The correct answer is option D.
Below the crust lies a layer of very hot, almost solid rock called the mantle. Beneath the mantle lies the core. … Sometimes, hot molten rock, called magma, bursts through Earth’s surface in the form of a volcano.