How did Runcorn, Blackett, and Bullard, use paleomagnetism to come to the conclusion that it was the continents and not the earth's magnetic north pole that wandered? Question 28 options: By comparing magnetic signals of rocks from different continents By observing the changing compass readings throughout their life time By measuring the change in solar radiation accompanying a shift in the earth's magnetic field By using the scientific method and developing an experiment with multiple magnetized rocks By monitoring the change in magnetic field of igneous rocks in the lab, as they cooled from a molten state