My son has a science project to measure the resistance of 5 metal cubes at different temperatures using a 9v battery. Metal cubes are all the same density and are: zinc, aluminum, iron, brass and copper. He is confused as to how to do this. He has a Sperry digital Multimeter. Questions: what is the appropriate Ohm setting? Where does he place the black and red leads in relation to the metal cube and battery to measure resistance?