Thermometer
Thermometer explained in an easy to understand way:
Imagine trying to decide what to wear based on the weather outside. Just as you check the sky and feel the air to gauge if a jacket is needed, a thermometer measures temperature by responding to changes in its environment. The thermometer acts like your senses, detecting how hot or cold it is, and then provides a clear readout, just as you make a decision based on your observations.
Practice Version
Thermometer: An instrument that measures temperature. Thermometer. A thermometer is a tool used to measure how hot or cold something is, helping students understand temperature changes in science.