The convection in the asthenosphere is pwered by heat from the ______________.

Density in the Eath's layers _____________ as you move towards the core.

The least dense part of the Earth is the ___________.

Which of these is NOT good evidence for Plate Tectonic Theory?

Where is the oldest crust found on Earth?

The temperature ___________ quickly as you travel from the crust to the core.

The ______________ is the only liquid layer of the Earth.

Which layer is a solid, iron-rich zone?

Choose the correct sequence of the ocean floor features from the beach outward.

What is the mountain chain under the ocean?

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