Environmental Science MCQ Questions and answers

31

This holds a planet's atmosphere close to its surface:

A) Radiation B) Gravity C) Cloud cover D) Moisture E) Pressure

Discuss

Answer & Solution

Answer: Option B

Solution:

Our atmosphere is a mixture of gases that surround Earth. It is kept in place by the pull of Earth's gravity. If Earth was a much smaller planet, like Mercury or Pluto, its gravity would be to weak to hold a large atmosphere.

32

During the afternoon the greatest temperature difference between the surface air and the air several meters above occurs on a:

A) Clear, calm afternoon B) Clear, windy afternoon C) Cloudy, calm afternoon D) Cloudy, windy afternoon

Discuss

Answer & Solution

Answer: Option A

Solution:

During the afternoon, the greatest temperature difference between the surface air and the air several meters above the ground occurs on a: clear, calm day.

33

Ideal conditions for a strong radiation inversion:

A) Clear, calm, dry, winter night B) Clear, calm, moist, summer night C) Cloudy, calm, moist, winter night D) Cloudy, windy, moist, summer night E) Clear, windy, dry, summer night

Discuss

Answer & Solution

Answer: Option A

Solution:

Ideal conditions for a strong radiation inversion: Clear, calm, dry, winter night.

34

Example of primary pollutant

A) SO₂ B) NO₂ C) CO D) hydrocarbons

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

35

In a photochemical smog, which gas is an eye and mucous membrane irritant?

A) SO₂ B) O₃ C) CO₂ D) N₂O

Discuss

Answer & Solution

Answer: Option D

Solution:

Nitrogen oxides are irritating to the eyes, skin, nose, mucous membranes and respiratory tract.

36

_________ element had guided the earlier navigators to keep them on right path.

A) Magnetite B) Carbon C) Coal D) Uranium

Discuss

Answer & Solution

Answer: Option A

Solution:

Magnetite element had guided the earlier navigators to keep them on right path.

37

Heat is energy in the process of being transferred from:

A) Hot objects to cold objects B) Low pressure to high pressure C) Cold objects to hot objects D) High pressure to low pressure E) Regions of low density toward regions of high density

Discuss

Answer & Solution

Answer: Option A

Solution:

Heat is energy in the process of being transferred from one object to another because of the temperature difference between them. After heat is transferred it is stored as "internal energy" which is the total energy stored in the molecules.

38

Which one is true?

A) symbiosis when neither population affects each other B) symbiosis when the interaction is useful to both the populations C) commensalism when none of the interacting populations affect each other D) commensalism when the interaction is useful to both the populations

Discuss

Answer & Solution

Answer: Option B

Solution:

Symbiosis when the interaction is useful to both the populations.

39

A population is a group of

A) individuals in a species B) species in a community C) communities in an ecosystem D) individuals in a family

Discuss

Answer & Solution

Answer: Option A

Solution:

A population is defined as a group of individuals in a species. Hence they can interbreed and include organisms in a geographical area. The total of all populations is called a universe.

40

Rising air cools by this process:

A) Expansion B) Evaporation C) Compression D) Condensation

Discuss

Answer & Solution

Answer: Option A

Solution:

Clouds form when moist, warm rising air cools and expands in the atmosphere. The water vapor in the air condenses to form tiny water droplets which are the basis of clouds.

Environmental Science MCQ Questions and answers | EVS MCQ