Science is way to broad of a subject to define a specific thing you are doing. It is the equivalent of someone asking what book you are reading and you replying, "a novel." Your experiment could also have life-changing effects on someone, so to underrate it as "doing science" would simply be inaccurate.
B for sure, considering iron oxide is just fancy for rust.
It is endothermic because heat energy is supplied to make the water of crystallization evaporate and make the compound anhydrous.
Answer:
Genotypes: Hh, Hh, hh, and hh
Phenotypes: Short Hair, Short Hair, Long Hair, Long Hair
Have a nice day! ^-^
