Sulfur Cycle Quiz Chem Y10

What is the primary source of sulfur entering the environment?

• Volcanic eruptions

• Weathering of rocks

• Industrial emissions

• Biological decomposition

Which of the following processes returns sulfur to the atmosphere?

• Volcanic eruptions

• Denitrification

• Photosynthesis

• Respiration

Which organism plays a crucial role in converting atmospheric sulfur to a form usable by plants?

• Sulfur-oxidizing bacteria

• Fungi

• Algae

• Earthworms

In what form do plants primarily absorb sulfur?

• Sulfates (SO4^2-)

• Sulfur dioxide (SO2)

• Hydrogen sulfide (H2S)

• Elemental sulfur (S)

What process involves the conversion of organic sulfur compounds into hydrogen sulfide (H2S)?

• Sulfur oxidation

• Sulfur oxidation

• Sulfur reduction

• Sulfur deposition

Which of the following is NOT a sink for sulfur in the environment?

• Sedimentary rocks

• Oceanic sulfate deposits

• Volcanic emissions

• Organic matter in soil

What human activity has significantly altered the sulfur cycle in recent centuries?

• Deforestation

• Mining

• Industrialization

• Fishing

What environmental consequence is associated with excessive sulfur deposition?

• Ocean acidification

• Eutrophication

• Desertification

• Coral bleaching

Which gas is responsible for the formation of acid rain when sulfur reacts with oxygen and water vapor in the atmosphere?

• Sulfur dioxide (SO2)

• Carbon dioxide (CO2)

• Nitrogen dioxide (NO2)

• Methane (CH4)

What process involves the transformation of sulfates into hydrogen sulfide by anaerobic bacteria in oxygen-poor environments?

• Sulfur oxidation

• Sulfur assimilation

• Sulfur reduction

• Sulfur deposition