Understanding Biogeochemical Cycles and Residence Time

1

Define biogeochemical cycles and explain why they are important to life on Earth.

2

What is the residence time, and why is it significant in understanding biogeochemical cycles?

3

Compare the residence times of water in glaciers and groundwater. What does this tell us about the availability of fresh water over time?

4

Why is the residence time of water in the atmosphere much shorter than that in the ocean?

5

How do human activities potentially affect the residence time of water in different reservoirs?

6

Explain how the distribution of water in Earth's reservoirs affects the global water cycle.

7

Given the volume and residence time data, which reservoir would you consider the most dynamic in terms of water exchange? Justify your answer.

8

Discuss the implications of the residence time of water in rivers for ecosystems and human water supply.

9

Considering the residence times, which reservoirs would be most affected by a prolonged drought? Explain your reasoning.

10

How does the concept of residence time apply to pollutants in the water cycle?

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