Plate Tectonics Unit Exam Review

Which of the following is more dense?

• Oceanic Crust

• Continental Crust

In which layer of the Earth does convection currents occur in?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is a solid ball?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is considered "plastic"?

• Lithosphere

• Asthenosphere

Which layer of the Earth is broken into tectonic plates?

• Lithosphere

• Asthenosphere

True/False: The Earth's tectonic plates are still moving at the rate of a few cm a year.

• True

• False

Which of the following is not a piece of evidence supporting the theory of continental drift?

• South America and Africa fit together like a puzzle piece

• Similar fossils on continents separated by oceans

• Similar genetic makeup of different populations

• Similar rock types on continents separated by oceans

Which of the following describes convection currents within the mantle?

• Hot magma sinks and rises as it cools

• Cool magma sinks and rises as it heats

• Hot magma sinks and stays there

• Cool magma sinks and stays there

What occurs as tectonics plates move apart from each other at mid-ocean ridges?

• Convection Currents

• Seafloor Spreading

• Mid-Ocean Ridge

• Subduction

What type of boundary does this image depict?

• Divergent

• Convergent

• Transform