Unit 8 ES Test Review

Which magnitude number was likely assigned to this earthquake?

• I

• VIII

• II

• XII

What best describes the process of subduction?

• The process of a more dense plate sinking beneath a less dense plate, during a tectonic collision.

• The process of tectonic plates pulling away from one another, leaving cracks between them.

• The process of two plates that hold land masses colliding, causing both plates to shift upward, forming a mountain range.

What is the probable cause of the movement of tectonic plates?

• The rotation of the earth causes the plates to slip

• The tilt of the earth causes the plates to slide

• The gravity of the sun pulls the plates.

• The unequal heating of the mantle cause convection currents that pull the plates

Identical rock types, identical fossils, and very similar mountain ranges are found on different continents that are separated by a wide ocean. Which of these best explains these observations?

• A. Organisms traveled between these continents on land bridges

• B. The same forces erode mountains in different locations

• C. These continents were joined together at one time in the past

• D. Some rock types are very common and are found everywhere

The basic idea of plate tectonics is that Earth’s surface is

• Divided into continents that move freely around

• One solid piece that moves over magma

• Divided into plates that move around and change size

• Shrinking and will eventually become one continent

What is a valid conclusion when comparing the tectonic activity of the east and west coasts of North America?

• There are more earthquakes and volcanoes on the west coast.

• The west coast has very little tectonic activity compared to the east coast.

7. ES 7b: Liquid rock beneath the earth’s surface is called

• Lava

• Pyroclast

• Cinder

• Magma

Determining how the seafloor changes over time has given scientists information about the

• Circulation of solar energy

• Patterns of carbon movement

• Formation rate of the ocean crust

• Impact of the atmosphere on ocean depth

Drag each item to the appropriate box. Match the layer of the earth with its description. Each layer may be used more than once. Not all terms will be used.

a

b

c

d

e

mantle

inner core

outer core

core

crust

Study this aerial view of an earthquake area. What type of boundary has faults like this one?

• A. Convergent boundary

• B. Transform boundary

• C. Divergent boundary

• D. Spreading