If a skull becomes fossilized, it would most likely be what type of fossil?

a mold fossil
cast fossil
petrified fossil
trace fossil

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

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