Kinetic Theory is a scientific explanation that describes how matter is made up of tiny particles, such as atoms and molecules. According to this theory, these particles are always in motion, and their movement is influenced by temperature. When the temperature increases, the particles move faster, which can lead to changes in the state of matter, like from solid to liquid. This theory helps us understand various phenomena, such as why gases expand when heated or why liquids can flow. It also explains the behavior of different states of matter, including solids, liquids, and gases, making it a fundamental concept in physics and chemistry.