Environmental Science MCQ Questions and answers

21

Global warming is caused by

A) GHGs B) CFCs C) CH₄ D) NO₂

Discuss

Answer & Solution

Answer: Option A

Solution:

Global warming is caused by GHGs(Green house gases).

22

Warming in the stratosphere is mainly caused by:

A) Absorption of ultraviolet radiation by ozone B) Release of latent heat energy during condensation C) Chemical reactions between ozone and chlorofluorocarbons D) Frictional heating caused by meteorites

Discuss

Answer & Solution

Answer: Option A

Solution:

The Primary Cause of Global Warming is Ozone Depletion. Atmospheric temperature decreases with altitude in the troposphere and increases with altitude in the stratosphere.

23

Major consumer of wood from forest is ___________

A) Thermal Power Plant B) Paper Industry C) Chemistry Industry D) none

Discuss

Answer & Solution

Answer: Option B

Solution:

Major consumer of wood from forest is Paper Industry.

24

_________ is the 12th Mega Biodiverse Country in the world.

A) India B) America C) China D) Sri Lanka

Discuss

Answer & Solution

Answer: Option A

Solution:

India is one of the 12 mega biodiversity countries in the world.

25

Which plants die after flowering?

A) Lotus B) Bamboo C) Chrysanthemum D) Butea

Discuss

Answer & Solution

Answer: Option B

Solution:

Bamboo die after flowering.

26

Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the:

A) Conduction of heat through the interior of the earth B) Concentration of earth's magnetic field lines at the poles C) Circulation of heat by the atmosphere and oceans D) The insulating properties of snow E) Release of latent heat to the atmosphere when polar ice melts

Discuss

Answer & Solution

Answer: Option C

Solution:

A radiation inversion is most commonly observed: just above the ground. Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by: the circulation of heat by the atmosphere and the oceans.

27

The intermediate developmental stages in the ecological succession is called

A) sere B) ecesis C) climax D) nudation

Discuss

Answer & Solution

Answer: Option A

Solution:

A seral community (or sere) is an intermediate stage found in ecological succession in an ecosystem advancing towards its climax community.

28

The final stable community in an ecological succession is called the

A) final community B) ultimate community C) climax community D) seral community

Discuss

Answer & Solution

Answer: Option C

Solution:

The final or stable community in a sere is the climax community or climatic vegetation. It is self-perpetuating and in equilibrium with the physical habitat.

29

Typically, water vapour occupies about what percentage of the air's volume near the earth's surface?

A) About 78 percent B) About 21 percent C) Close to 10 percent D) Less than 4 percent E) None of these

Discuss

Answer & Solution

Answer: Option D

Solution:

Typically, water vapour occupies about less than 4 percent of the air's volume near the earth's surface.

30

Heavy dust can cause

A) leaf blights B) opening of stomata C) closure of stomata D) browning of leaves

Discuss

Answer & Solution

Answer: Option C

Solution:

Heavy dust can cause closure of stomata.

Environmental Science MCQ Questions and answers | EVS MCQ