Question detail

Why is desalination considered energy-intensive?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Using the Earth's resources and obtaining potable water

Question

A. It requires large amounts of electricity to operate machinery
B. It uses a lot of water in the process
C. It involves chemical reactions that consume energy
D. It needs constant monitoring and maintenance

Answer

The correct option is It requires large amounts of electricity to operate machinery. This answer is correct because it matches the approved learning objective to describe desalination as a method for obtaining potable water from salty water or sea water in the subtopic Potable water.

Explanation

The correct option is It requires large amounts of electricity to operate machinery. It requires large amounts of electricity to operate machinery is correct because it directly supports the approved learning objective to describe desalination as a method for obtaining potable water from salty water or sea water. 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

Confusing Desalination with Filtration

Students often confuse desalination with filtration, thinking both processes are the same for obtaining potable water.

Understand that desalination specifically refers to the removal of salt from salty water or sea water, while filtration is a separate process that removes impurities from water.

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