A flask filled with colored water has a thin glass tube inserted through the stopper. When the flask is placed in a basin of ice water, the water level in the tube __________.
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Worked Solution
Step 1: Ice water is colder than the flask.
Step 2: The water in the flask loses heat to the ice water.
Step 3: When liquids lose heat, they contract and occupy less space, causing the level to drop.
Correct answer: drops because water contracts when it loses heat
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