Standard Science Primary 4 Energy

When using a thermometer to measure the temperature of boiling water, why must we NOT let the bulb touch the base of the beaker?

A The water will stop boiling.
B The thermometer will break immediately.
C The thermometer will measure the temperature of the beaker instead of the water.
D The base of the beaker is too cold.
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Worked Solution

Step 1: The goal is to measure the water temperature. Step 2: The beaker is in direct contact with the heat source and may be at a different temperature than the water. Step 3: Touching the base gives an inaccurate reading for the water.

Correct answer: The thermometer will measure the temperature of the beaker instead of the water.

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