Answer:
it may be electron, atom or ions depend on the nature of the substance and the character of reaction
like :- particles per mole, coulombs per electron
I would say it’s helps with basic reproduction and let’s animals develop more.
4. the rock cycle is the layering of eroded sediments
D! because when you record something you will probably analyze the results and those are two big KEY components of an Experiment! <span />
