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Seismologists study shock, or seismic, waves as they travel through the Earth's interior. Seismic waves tell us that the Earth's interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core.
Seismologists study shock, or seismic, waves as they travel through the Earth's interior. ... Seismic waves tell us that the Earth's interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core