Describe the evidence for the kinetic particle theory

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

It decreases by 4 is your answer mark brainliest 

Atomic weight. the more precise answer is atomic mass