Geology belongs to which main category of science? life science physical science earth science

What must occur for air masses to form fronts

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.

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius