Which of the following is a correct scientific practice

the wires in the toaster turning red and the toast crisping and turning brown

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

the animal that would be cutest if scaled down to the size of a cat? elephant