5. The motion of gas or liquid caused by differences in temperature is a A. tectonic movement B. plate tectonic C. convection current D. magma chamber 6.Which is not a geologic feature that occurs in the plate boundaries? A. mountains B. volcanoes C. trenches D. subduction 7. In which part of the innermost layer of the earth does convection current occur? A. inner core B. outer core C. mantle D. asthenosphere
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Answer:
5. B
6. A
7. B
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