* Slower Movement: As the temperature decreases, the particles inside the thermometer (usually mercury or alcohol) slow down their movement. This is because they have less thermal energy.
* Closer Spacing: Since the particles are moving slower, they collide less frequently and with less force. This causes them to move closer together, taking up less space.
* Contraction: The overall volume of the liquid in the thermometer contracts because the particles are packed more tightly.
* Lower Reading: The contraction of the liquid causes the level to drop in the thermometer's narrow tube. This lower level corresponds to a lower temperature reading.
In short: When the temperature goes down, the particles inside a thermometer move slower, occupy less space, and cause the liquid to contract, resulting in a lower reading on the scale.
