Isostacy is

Our knowledge of the core is based on

4.6 billion years ago, Earth became sorted into density-based layers in the process of

Seafloor spreading was the hypothesis of

Seafloor spreading is __ the rate of subduction.

The sinking of the oceanic lithosphere into the asthenosphere

Which is not something that pushes seafloor apart?

Two plates moving past one another is a

Which layer is NOT a layer based on composition?

Meteorology is the study of

Organisms in ocean trenches get energy from

The innermost layer of Earth is

The layer that is composed of the crust and the upper mantle

the process by which new lithosphere is created at midocean ridges as older lithoshere moves away

We are able to study the mantle by

Earth's innermost layer, which is mostly iron and includes the inner core and outer core

separate pieces of lithosphere that move on top of the asthenosphere

the study of the history, structure, and natural processes of planet Earth

What are conditions like in ocean trenches?

What was not evidence of continental drift?

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