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10th Grade Water Pollution Quizzes , Questions & Answers

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10th Grade

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Measuring Oxygen: BOD and COD Explained Quiz

This quiz on Measuring Oxygen: BOD and COD Explained features 15 questions designed for students in Grade 10. You will explore key concepts such as Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD), which are...

Questions: 15 | Attempts: 20 | Last updated: Mar 9, 2026

Sample Question 1
What does BOD (Biochemical Oxygen Demand) specifically measure

The amount of salt in the water

The oxygen used by microorganisms to decompose organic matter

The total weight of fish in a lake

The speed of the water current

Sample Question 2
How does COD (Chemical Oxygen Demand) differ from BOD

COD only measures living things

COD uses strong chemical oxidants to break down all organic matter

COD is much slower than BOD

COD measures the temperature of the water

Sample Question 3
A very high BOD level in a river usually leads to a decrease in _____, which can cause fish kills

Dissolved oxygen

Water temperature

PH levels

Nitrogen gas

10th Grade Water Pollution Quizzes , Questions & Answers

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