Jenna took an open bowl of leftover mashed potatoes from the refrigerator and noticed a difference in smell. She determined that chemical changes occurred since the potatoes were first placed there. Which observations most likely led to Jenna’s conclusion?

Explanation:

A chemical change is one in which a new kind of matter has formed. It involves chemical reactions occurring within a given substance. For the mashed potato, some of the observations might be;

Turning into liquid of the mashAlso, the process cannot be reversedThere might have been a mass changeThe odor comes from the new products that are formed which is from a gas released from the decomposition of the mashed potato.

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.

You get 6 for mechanical