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Mr Mathews Eighth period should me less than 45 minutes/ Danielle Curtis

Across
the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
1.the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat
_____ Wegener was a German polar researcher, geophysicist and meteorologist
Down
a hypothetical continent including all the landmass of the earth prior to the Triassic period when it split into Laurasia and Gondwanaland
tectonics is a scientific theory that describes the large-scale motion of Earth's lithosphere
__________ drift is the movement of the Earth's continents relative to each other, thus appearing to "drift" across the ocean bed