Astronomers believe that early galaxies grew from the repeated mergers of smaller gas clouds. If this idea is true, then the properties of galaxies must have changed over time. Determine whether each property below increases or decreases over time, and then sort each property into the appropriate bin.

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.