Plate Tectonics Test

The convergence of two continental plates would produce

folded mountains.

Which area of the diagram shows the subduction zone?

3- C

What are mid-ocean ridges?

A chain of underwater mountains

Which geological events are most common along tectonic plate boundaries?

earthquakes and volcanoes

What do earthquakes tell scientist about the history of the planet?

The continents of Earth are continually moving.

Point A is where the earthquake actually occurred, what is it called?

Focus

Of the following statements, which best supports the continental drift theory?

Fossils of the same species of extinct land plants have been found in both South America and Africa.

Which of the following is the best evidence that Earth's continents were once in vastly different positions than they are today?

Fossils of tropical plants are found in Antarctica.

This is the name for the chain of volcanos around the edge of the Pacific Plate.

Ring of Fire

Which was NOT evidence of Wegener?

Seafloor spreading

Which of the following occurs because of convection currents?

Tectonic plates on the crust move.

On the Atlantic Ocean floor, there is a long ridge of underwater mountains caused by volcanic eruptions. New volcanoes keep erupting, and new mountains keep forming. Why is this happening?

The ocean floor is spreading.

New crust is being produced at a mid-ocean ridge. How does this affect Earth's crust?

The older crust is recycled at subduction zones.

Explain the process that broke up Pangaea. Explain the process that broke up Pangaea and still causes the continents to move.

Theory of plate tectonics.

Which is true about the continents of the world?

They are slowly moving along tectonic plates.

Which of the following best describes Earth's tectonic plates?

They move because of convection currents in the mantle.

Which of these describes a divergent boundary?

Two continental plates moving away from each other, forming a rift valley.

The mantle of Earth is made partly of magma. When magma rises and sinks, this is called ______________.

a convection current

Scientists think that convection currents that move the plates flow in Earth's

asthenosphere

During sea floor spreading, molten material rises up from the mantle...

at the mid ocean ridges

It would be correct to say that in another 50 years the continents will...

be in almost the same positions as they are in today.

Based on the diagram, which process explains why less dense, hot magma rises to the surface to displace more dense, cooler magma?

convection

A rift is evidence of which kind of plate boundary?

divergent.

Associated with transform boundaries.

earthquakes

n area where magma melts through the crust in the middle of a plate is called a ________.

hot spot

Which of the following is most responsible for the formation of new crust at the edge of a tectonic plate?

magma rising up from the mantle at a divergent boundary.

Scientists think that convection currents flow in Earth's

mantle

Seafloor spreading provides evidence of which of the following Earth processes?

movement of crustal plates

The best evidence that the continents were once connected is that they have matching...

rock types, fossils, and coastlines.

Which of the following provides evidence for plate tectonics?

sea-floor topography.

Which of the following is where one plate slides under another plate?

subduction zone

If the focus of an earthquake occurs beneath the sea floor, as the seismic waves travel through the ocean, they create a massive and destructive

tsunami

Which feature would most likely be forming at converging continental tectonic plate boundaries?

uplifted mountain