Unit 4 Review 3B Earth Science

Convection currents only occur in the Mantle

The density of Earth's crust is...

What are the physical layers of the Earth's interior?

31. How does Earth's core heat up?

The age of the ocean floor

Radioactive decay releases what type of energy.

Why do convection currents at the mantle occur?

what do s waves travel through?

What describes the heat that results from the radioactive decay of elements in the Earth?

What is one way that mid-ocean ridges provide evidence of sea floor spreading?

Which letter represents the oldest sea floor

The largest portion of Earth's interior is

Which layer of Earth's interior has the highest temperature?

The Earth's crust is:

What is the process of adding new crust on the sea floor

What Causes Plate Tectonics?

How do scientists know what the mantle and core are made up of?

Why is magnetic reversal so important?

True or false p waves are the fastest

What are the layers of Earth?

Convection currents influence tectonic plate movement

Energy from Earth's interior causes the melting of rock material.

What are convergent plate boundaries?

Mountains built from magma that rises from the Earth's interior to the surface.

Why does magnetic reversal happen?

Without what convection currents will eventually stop?

The magma the creates new sea floor comes up from the

Transform plate boundaries...

A convergent boundary between a Continental and Oceanic plate will result in...