MS MS in Environmental Science 1

Question 1

Which biogeochemical cycle describes the movement of carbon through the atmosphere, oceans, and living organisms?

Accepted Answer

Carbon cycle

Answer

The carbon cycle tracks how carbon atoms circulate through the atmosphere (CO₂), oceans, soil, and living organisms via photosynthesis, respiration, and decomposition.

Question 2

What term describes the maximum population size an environment can sustainably support?

Accepted Answer

Carrying capacity

Answer

Carrying capacity (K) is the maximum population size of a species that a given environment can sustain indefinitely given available resources.

Question 3

Which international agreement, adopted in 2015, aims to limit global temperature rise to 1.5°C above pre-industrial levels?

Accepted Answer

Paris Agreement

Answer

The Paris Agreement, adopted at COP21 in 2015, commits signatory nations to nationally determined contributions to keep warming well below 2°C and pursue efforts toward 1.5°C.

Question 4

What is the primary source of stratospheric ozone depletion?

Accepted Answer

Chlorofluorocarbons (CFCs)

Answer

Chlorofluorocarbons (CFCs) release chlorine atoms in the stratosphere that catalytically destroy ozone molecules, leading to the ozone hole phenomenon.

Question 5

Which soil horizon is characterized by organic matter accumulation and is closest to the surface?

Accepted Answer

O horizon

Answer

The O horizon is the uppermost soil layer composed primarily of decomposing organic material such as leaf litter, mosses, and humus.

MS - Master of Science Practice Test

MS - Master of Science Practice Test

MS MS in Environmental Science 1