Nutrient Cycling MCQs (Quiz 5)

1. Which of the following minerals is highly susceptible to solution weathering?

Rock salt

Mica

Quartz

Feldspar

2. Why does the combustion of fossil fuels disrupt the natural carbon cycle?

It permanently removes carbon from biological systems

It prevents carbon fixation by plants

It transfers carbon from long-term geological storage to the atmosphere rapidly

It converts atmospheric nitrogen into carbon dioxide

3. In the context of nutrient cycling, leaching is best defined as ____________________

The microbial breakdown of organic matter releasing inorganic nutrients

The biological conversion of nitrates into atmospheric nitrogen gas

The addition of mineral nutrients to soil through weathering of bedrock

The downward movement of water through soil that carries dissolved nutrients away from the root zone

4. Deforestation accelerates climate change primarily because it ____________

Reduces phosphorus weathering rates

Decreases the capacity of ecosystems to absorb atmospheric CO₂

Increases nitrogen fixation in forest soils

Enhances decomposition of carbonate rocks

5. Hydrolysis of minerals involves _____________

Reaction between oxygen and minerals

Physical fragmentation of minerals by wind

Expansion of water in minerals upon freezing

Reaction of water with minerals to form new substances

6. Which substance is the starting material for nitrification?

Nitrogen gas (N₂)

Ammonia / Ammonium (NH₃ / NH₄⁺)

Urea

Nitrate (NO₃⁻)

7. Which weathering agent is considered the most important overall?

Wind

Water

Gravity

Temperature

8. A major perturbation of the carbon cycle by human activity is associated with _____________________

Removal of carbon from the atmosphere in fertilizer production

Release of carbon from fossil fuel deposits

Respiratory production of CO₂ by the human population

Accelerated removal of carbon from the atmosphere by forests

9. Which of the following is an example of a nutrient source in the carbon cycle?

Ocean water dissolving atmospheric CO₂

A growing forest absorbing CO₂

A volcano releasing CO₂ into the atmosphere

Soil storing organic carbon

10. Rust formation on rocks is an example of ______________

Hydrolysis

Exfoliation

Oxidation

Carbonation

Question 1 of 10

Nutrient Cycling MCQs (Quiz 5)

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