What evidence is used to support the theory of plate tectonics? a. the continental drift hypothesis
b. the process of erosion and deposition
c. the presence of molten iron in earth’s core
d. the magnetic reversals found in the oceanic crust

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.