Question

explaining how thermometers work
complete the passage to explain how thermometers work.
temperature is read by measuring the liquid in the thermometer using the scale on the thermometer. when the
temperature rises, the liquid in the thermometer. when the temperature drops, the liquid in the thermometer

Explanation:

Thermometers work based on the principle of thermal expansion. When the temperature rises, the liquid (such as mercury or alcohol) in the thermometer expands. This expansion causes the liquid column to rise. Conversely, when the temperature drops, the liquid contracts, and the liquid column falls. This change in the level of the liquid is then measured against the scale on the thermometer to determine the temperature.

Answer:

When the temperature rises, the liquid in the thermometer expands. When the temperature drops, the liquid in the thermometer contracts.