STB 321 Theory Questions: Dissolved Oxygen, Hydrological Cycle, and Water Pollution Concepts

300 Level Department of Science Laboratory Technology exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.

Questions:

a. Briefly discuss the importance of dissolved oxygen in surface waters.

b. Water is a natural resource renewed naturally by the hydrological (water) cycle. Explain this with the aid of a diagram.

c. Define the following

i. Biodegradable pollutants
ii. Non-biodegradable pollutants
iii. Water pollution.

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