Practice Summary Of Methods And Reporting (4.2) - Analysis Methods – Review of Standard Methods

Practice: Summary of Methods and Reporting

Lesson 4.2Analysis Methods – Review of Standard Methods

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9 questions

Flashcard drill
4 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.
Define BOD.
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Think about what happens to oxygen when organic matter is present.
Question 2.
What does COD measure?
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Consider both biological and non-biological reactions.
3Question 3.
What is the purpose of BOD?
- Measure living organisms' activity
- Total oxygen used by an ecosystem
- Overall water purity
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Consider biological demands for oxygen as related to organic substances.
4Question 4.
True or False: A bioassay is used to determine only chemical composition.
- True
- False
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Reflect on the role of living organisms in testing for toxicity.
Question 5.
Consider a lake with a BOD of 300 mg/L and a COD of 500 mg/L. Discuss the implications for the aquatic ecosystem and what potential actions can be taken.
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Link BOD values to oxygen availability and species health.
Question 6.
A bioassay reveals 70% mortality in a standard fish population within a polluted water body. Analyze what this indicates about the water quality and propose a follow-up investigation.
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Consider the relationship between toxicity and living organism health.

5 more questions in this section. Enroll free to practise them all.