Answer:
The answer is A
Explanation:
Seafloor spreading causes continental plates such as the North American Plate and the Eurasian plate to move apart in the mid-Atlantic ridge. However, the movement of the plate can cause the plates to move towards others. Eventually, when the continental plates move together they form supercontinents. The convection currents in the mantle are the driving force under the tectonic plates.
Answer:
D) Anaerobic organisms must have come first because there was no oxygen in the atmosphere.
Explanation:
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Answer:
low-density - having low relative density or specific gravity. light - of comparatively little physical weight or density; "a light load"; "magnesium is a light metal--having a specific gravity of 1.74 at 20 degrees C" 2.
The first blank is Harry Truman, who was President of the United States after FDR.
The second blank is the Soviets, since the Cold War was mainly characterised by the stalemate between the Communist superpower USSR and the democratic superpower US.