but if you want it short and one paragraph here:When you heat a gas, its particles gain kinetic energy and move faster, causing the gas to expand if it’s in an open space or increase in pressure if it’s in a closed container. This results in a rise in temperature, which reflects the increased motion of the particles. The state of matter in this case is gas, one of the four main states of matter—solid, liquid, gas, and plasma—each defined by how particles are arranged and how they move. If heated to extremely high temperatures, a gas can change into plasma, a high-energy state where particles become electrically charged.