Practice Advection And Its Influence (5) - Other Mechanisms of Chemical Release From Sediments – Part 2

Practice: Advection and Its Influence

Lesson 5Other Mechanisms of Chemical Release From Sediments – Part 2

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is advection?
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Think about how materials move with the water current.
Question 2.
Define bioturbation.
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Consider what happens when organisms like worms burrow in the soil.
3Question 3.
What is the primary function of advection in aquatic environments?
- To mix sediments
- To carry materials by water flow
- To promote chemical reactions
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Think about how rivers carry sediment downstream.
4Question 4.
True or False: Resuspension increases water clarity.
- True
- False
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What happens when sediments are stirred up in water?
Question 5.
Given a sediment layer with known bulk density, calculate the impact of bioturbation by organisms on diffusion rates. Assume a 15% increase in pore space due to bioturbation.
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Use the relationship between pore space and effective diffusivity.
Question 6.
Examine a scenario where methane is produced in an anaerobic sediment environment. Calculate how this gas might influence chemical transport through advection.
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Sketch a diagram of gas movement and consider how it impacts nearby chemicals.

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