NTA Environmental Science

Question 1

Which greenhouse gas is most responsible for recent human-caused climate change?

Accepted Answer

Carbon dioxide (CO₂)

Answer

Water vapor

Answer

Methane (CH₄)

Answer

Nitrous oxide (N₂O)

Question 2

The ozone layer, which protects Earth from ultraviolet radiation, is located in the:

Accepted Answer

Stratosphere

Answer

Troposphere

Answer

Mesosphere

Answer

Thermosphere

Question 3

What is biodiversity?

Accepted Answer

The variety of life forms in a given area

Answer

The study of plant biology

Answer

The process of decomposition

Answer

The water cycle in an ecosystem

Question 4

Which of the following is a renewable energy source?

Accepted Answer

Solar energy

Answer

Coal

Answer

Natural gas

Answer

Petroleum

Question 5

The process by which nitrogen is converted from the atmosphere into a usable form for plants is called:

Accepted Answer

Nitrogen fixation

Answer

Nitrification

Answer

Denitrification

Answer

Ammonification

Question 6

Acid rain is primarily caused by which gases?

Accepted Answer

Sulfur dioxide and nitrogen oxides

Answer

Carbon dioxide and methane

Answer

Ozone and chlorine

Answer

Oxygen and hydrogen