Question detail
Why is it important to treat seawater before it is used for drinking?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using the Earth's resources and obtaining potable water
Question
- A. To increase its temperature
- B. To remove harmful microbes and salts
- C. To add nutrients for health
- D. To change its color
Answer
The correct option is To remove harmful microbes and salts. This answer is correct because it matches the approved learning objective to explain why desalination processes require large amounts of energy in the subtopic Potable water.
Explanation
The correct option is To remove harmful microbes and salts. To remove harmful microbes and salts is correct because it directly supports the approved learning objective to explain why desalination processes require large amounts of energy. This belongs to the subtopic Potable water within Using the Earth's resources and obtaining potable water, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Potable water.
Common mistake
Desalination Energy Requirements
Students often think that desalination processes require energy only for the actual separation of salt from water.
Emphasize that energy is also needed for the initial heating of water and maintaining the pressure in processes like reverse osmosis.
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