Students of different ages were given the same jigsaw puzzle to put together. they were timed to see how long it took to finish the puzzle. which on is the independent variable, dependent variable, and controlling variables?

The most efficient way to establish the best possible economizer position is to measure

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

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.