9
lesson pretestMultiple Choice

Pretest

Question 9 • Physical Science

What property allows salt to be collected from ocean water?

Answer
A
Salt and water form a heterogeneous mixture.
B
Salt has a higher boiling point than water.
C
Salt has a higher density than water.
D
Salt and water are in different physical states.

Explanation

Water boils and evaporates at a lower temperature than salt, so heating ocean water causes the water to leave as vapor while the salt remains behind. Salt’s higher boiling point makes it possible to collect the salt after the water evaporates.

AI-written and checked against the verified answer.

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