The central portion of the earth is:

The layer of the upper mantle composed of low density rock material that is semiplastic, like putty is the:

The outermost, rigid layer of the earth composed of the stiff upper layer of the mantle and the crust is the:

The boundary between the mantle and the crust is:

The crust on which the continents rest:

The crust on which the oceans rest:

The thin, hard outer layer of the earth

Which layer of the earth has the greatest variety of features?

What are the layers of the earth in order from surface to center?

The temperature of the earth's inner core is about:

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