Temperature
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Example:
Imagine you're at a party, and you notice how lively or dull it feels depends on how much people are moving around. Similarly, the temperature of an object is determined by how energetically its particles are moving. Just like a high-energy party feels 'warmer' with people dancing and talking, an object is hotter when its particles are moving rapidly, while a 'cooler' party, where people are standing still and quiet, mirrors the slow movement of particles in a colder object.
Practice Version
Temperature: How hot or cold something is, it is determined by the kinetic energy of its particles. Temperature is a measure of how fast the molecules in a substance are moving.