Explain the most important difference between a physical and chemical change.

answer below... hope this helps

Explanation:

When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.

Burning of paper and log of wood, Digestion of food, Boiling an egg, Chemical battery usage, Electroplating a metal, Baking a cake, Milk going sour is a chemical change

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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