Cambridge Science – States of Matter Practice Test 2026 - Free Science Practice Questions and Study Guide

Temperature tells us how hot or cold something is, tied to how fast its particles move. To measure it, you use a thermometer. It can be the classic liquid-in-glass type, where the liquid expands as temperature rises, or a digital sensor that converts heat into a reading. The other instruments measure different properties: a barometer gauges atmospheric pressure, a hygrometer measures humidity, and a calorimeter assesses heat energy in a process. So for measuring temperature, a thermometer is the right tool.