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Chapter Six Crossword

Across
Moving piece into which the lithosphere is broken
Transfer of energy by motion or heated gas or liquid.
Pattern in which material is heated, rises in one area then cools and sinks in anohter.
Earth's thickest layer
Line of sea floor mountains
Layer of molten metal
Down
Began breaking apart 200 million years ago
Solid sphere of metal, mainly nickle
Earth's layer with average thickness of 40km
Made up of the Earth's crust and upper mantle
Layer where rock is soft and weak because it is close to melting.
Hypothesis that the Earth's continents move