3. Earth Systems

Biogeochemical Cycles — Quiz

Test your understanding of biogeochemical cycles with 5 practice questions.

Practice Questions

Question 1

Which of the following processes is primarily responsible for converting atmospheric nitrogen ($N_2$) into ammonia ($NH_3$) or ammonium ($NH_4^+$) in the soil, making it available for plants?

Question 2

The excessive use of synthetic fertilizers in agriculture primarily disrupts which biogeochemical cycle by leading to eutrophication in aquatic ecosystems?

Question 3

Which of the following human activities significantly contributes to the release of sulfur dioxide ($SO_2$) into the atmosphere, leading to the formation of acid rain?

Question 4

In the carbon cycle, which of the following processes involves the conversion of organic carbon from dead organisms into carbon dioxide ($CO_2$) and methane ($CH_4$) by decomposers?

Question 5

Which of the following is a direct consequence of increased nitrogen and phosphorus runoff into coastal marine ecosystems?