How do scientists use the kinetic theory of matter?

The energy of moving matter is called kinetic energy. Scientists think that the particles of all matter are in constant motion. In other words, the particles of matter have kinetic energy. The theory that all matter consists of constantly moving particles is called the kinetic theory of matter. 

If particles do not have enough kinetic energy to overcome the force of attraction between them, matter exists as a solid.If particles have enough kinetic energy to partly overcome the force of attraction between them, matter exists as a liquid.If particles have enough kinetic energy to completely overcome the force of attraction between them, matter exists as a gas.

  ecosystems  maintain themselves by cycling  energy   and nutrients obtained from external sources. at the first trophic level, primary producers (plants, algae, and some bacteria) use solar  energy   to produce organic plant material through photosynthesis