Plate Tectonics Review

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

The mid-ocean ridge is

Geologists study the constructive forces, such as volcanoes, that build up landmasses on Earth's surface.

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

The part of the mantle that is made of soft rock that seems plastic-like and bends

According to Wegener's hypothesis of continental drift,

The place where two plates come together is known as a

The place where two plates come together is know as a

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

What is Pangaea?

Earth's inner core is

Scientists who study the forces that make and shape planet Earth are called

6. Forces that shape Earth's surface by building up mountains and landmasses are called

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

The geological theory that states that pieces of Earth's lithosphere are in constant, slow motion is the theory of

Earth's magnetic field results from the spinning of the

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

To support his theory, Wegener provided evidence  from _____________, traces of ancient organisms preserved in rock.

Earth's solid inner core spins inside the hot, molten metal of which layer?

An ocean plate sinks beneath a trench and back into the mantle in a process known as

The longest mountain chain on Earth that mostly lies under the ocean.

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

Two of earth's plate's slip past each other, moving parallel but in opposite directions at a

The mantle makes up what percentage of Earth by volume?

The crust makes up what percentage of Earth by volume?

Geologists learn about Earth's interior by studying _____________, which move through Earth during an earthquake.

The mid-ocean ridge occurs along transform boundaries.

Which layer is made up of the continents and oceans?

This process continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.

Oceanic crust is made up mostly of an igneous rock called

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

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

Earth's mantle is

Alfred Wegener believed that the continents had once been joined in one landmass called

What type of boundary occurs when a continental plate collides with an oceanic plate.

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

Combined, the inner core and outer core make up what percentage of Earth by volume?

Scientist that study the forces that shape Earth's surface are called

The outermost layer of Earth is called the mantle.

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

A rift valley forms where two plates

What theory claims that all the continents were once joined as a single supercontinent and have since drifted apart?

The asthenosphere and lithosphere are part of which layer?

The formation of volcanoes and mountain ranges can be explained by the theory of

The North American Plate and the Eurasian plate are moving apart at a very slow rate.

What forms when continental plates pull apart at a divergent boundary on land?