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

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as

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

The geological theory that states that pieces of Earth’s lithosphere (or crust) are in constant, slow motion is the theory of

Earth’s lithosphere (or crust) is broken into separate sections called

t a convergent boundary where a deep-ocean trench occurs, the crust is

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

The place where two tectonic plates collide together is called

Mid-ocean ridges and sea-floor spreading occurs at a

Before lava reaches the surface, the molten material is called

Heat transfer within a fluid takes place by

Scientists think that convection currents flow in Earth’s

What is moving in the mantle?

The sun warming your skin and a fire providing heat is an example of

A rift valley forms at

Mountain Ranges on land will occur at

Sea floor spreading and mid-ocean ridges occur at

Pressure increases with depth toward the center of Earth. In which layer would you expect pressure to be the greatest?

Earth’s solid inner core is surrounded by the hot, molten metal of which layer?

You might find volcanoes

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