Plate Tectonics

What is Pangaea?

Identify the type of plate boundary

The crust is what percent of the Earth's volume

________ first proposed the theory of continental drift.

Most geologists think that the movement of Earth’s plates is caused by

The relatively soft layer of the upper mantle is

Earth’s inner core is

The part of the mantle called the ______________ is made of soft rock that bends like plastic.

Earth’s magnetic field results from movements in the _______

How do underwater mountain ranges form?

Which type of evidence was NOT used by Wegener to support his continental drift hypothesis?

In the mantle, heat is transferred as soft rock flows slowly in cycles known as

What is the correct order (starting from the surface) of Earth’s layers?

Scientists think that convection currents flow in Earth’s

Identify the type of plate boundary

A place where two plates slip past each other, moving in opposite directions, is known as a

Oceanic crust consists mainly of rock called?

Most geologists rejected Alfred Wegener’s idea of continental drift because

According to Wegener’s hypothesis of continental drift

The theory of _______ states that pieces of Earth’s lithosphere are in constant, slow motion

A rift valley forms at a

Process where the ocean floor sinks beneath a deep-ocean trench and back into the mantle is

Breaks in the Earth's crust where rocks slip past each other are called

Process of ___ adds new crust to the ocean floor along both sides of the mid-ocean ridge.

Identify the type of plate boundary

A collision between two pieces of continental crust at a converging boundary produces a

In sea-floor spreading, molten material rises from the mantle and erupts

Subduction occurs where the oceanic crust bends down toward the mantle at a(an)

The lithosphere is broken into sections called ____ which float on top of the asthenosphere.

Holes drilled into Earth’s crust provide direct evidence about Earth’s interior in the form of