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Layers of the Earth

Plate Tectonics
Across
Made of iron and nickel
200 million years ago Wegener believed that there was a single landmass called ______.
Partially molten layer that the tectonic plates float on
Hard outer layer
____means away/separate
____means slide past
Hess discovered ________ floor spreading
Solid ball of iron and nickel, hottest and most dense layer
Down
Ring of Fire is mostly __________ and transform.
As you go deeper into Earth's layers, _____, pressure,and density increase.
Hess used ________ technology to discover sea floor spreading.
This means towards, trench, mountains, volcanoes, oceanic-oceanic are examples
Harry ________ invented sea floor spreading.
Thickest layer, contains 2/3 of earth's mass, partially molten (part liquid/part solid)
Africa and South America ____ together like a crossword puzzle.