HELP PLEASE When ice changes into water, it is an example of a change. Also, when water changes into water vapor, it is an example of a change.

A. physical...physical

B. chemical...chemical

C. physical...chemical

D. chemical...physical

Which characteristics can be used to differentiate star systems? check all that apply.

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Uranium can supply energy for the worlds electricity without admitting harmful greenhouse gases which of these statements best describes an outcome of uranium mining