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Use the diagram below to answer questions 38 and 39.
The diagram below represents the Earth’s crust and interior layers.
38 Which evidence most likely led scientists to conclude that there are different
layers within Earth’s interior?
A. analysis of earthquake wave data
B. rock samples taken from Earth’s core
C. measurement of Earth’s diameter
D. temperatures taken within each layer
Which Earth layer contains convection currents that are believed to be
39
responsible for the movement of Earth’s tectonic plates?
A. the crust
B. the outer core
C. the mantle
D. the inner core
Which of the following represents the process by which air flows from one
40
location in the atmosphere to another?
A. radiation
B. absorption
C. convection
D. conduction
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