Plate Tectonics Test Prep

The outermost layer of the earth is called the mantle

When a heat source is removed from a fluid, convection currents in the fluid will:

Pressure increases from Earth's surface toward the center of the earth.

Oceanic crust near the mid-ocean ridge is younger than the crust farther away from the ridge

Most geologists rejected Wegener's idea of continental drift because:

Using data from seismic waves, geologists have learned that Earth's interior is made up of

How did scientists discover that rocks farther away from the mid-ocean ridge were older?

Scientists think that convection currents flow in earth's

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

Mid-ocean ridges are

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

A rift valley forms at a

The place where two plates come together is known as a

Along a divergent boundary, two plates slip past each other, moving in opposite directions

What evidence was not used by Alfred Wegener to support his continental drift hypothesis?

When you touch a hot pot or pan, energy moves from the pot to your hand. This is called:

What did scientists in a submersible see when they observed the mid-ocean ridge?

The geological theory that states that pieces of the lithosphere are in constant slow motion is

Geologists obtain indirect evidence about Earth's interior by:

Earth's mantle is

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

Any trace of an ancient organism that has been preserved in rock is called a

Earth's magnetic field results from movement in the:

Along the Mid-Atlantic ridge, the North American plate and the Eurasian plate are moving apart

Old oceanic crust is more dense than new oceanic crust because it is

What is Pangaea?

Earth's inner core is

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

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

Holes drilled several km into Earth's crust give direct evidence of the interior in the form of

Heat transfer within a fluid takes place by:

If subduction occurs faster than oceanic crust can be created, an ocean will expand

Mantle material rises in convection currents because heated material becomes more dense

To study Earth's interior, geologists rely on indirect evidence, like evidence from fossils.

The transfer of heat by the movement of heated fluid is called conduction

What technology did scientists use in the mid-1900's to map the mid-ocean ridge?

According to Wegener's hypothesis of continental drift,

The transfer of energy through empty space is called:

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

Wegener used evidence from landforms, climate and fossils in support of the shrinking earth