Scientific theory		evidence that can be observed by your five senses
Empirical evidence		an idea or concept that gives explanation for something observed
Continental drift		a theory that explains how the Earth’s continents came to be in their current position
Alfred Wegener		a German geologist who developed the theory of continental drift around 1912
Seafloor spreading		when hot magma from the Earth’s mantle pushes up through the part of the Earth’s crust that is beneath the ocean causing the seafloor to spread apart