Plate Tectonics

The edges of moving tectonic plates are called -

• Ocean basins

• Tectonic plate boundaries

• Intercontinental plains

• Faults

All of the following features indicate tectonic activity except -

• Mid-ocean ridges

• Trenches

• U-shaped Valleys

• Volcanic Island Arcs

Which of the landforms is most likely to result when two continents collide?

• Mountains

• Volcanoes

• Islands

• Rift Valleys

Which feature is not likely to occur at a subduction zone?

• Trench

• Mid-ocean Ridge

• Volcanic Island Arc

• Continental Volcanic Arc

The Marianas Trench in the Pacific Ocean is 36,160 feet below sea level. This deep oceanic trench is caused by -

• Swift ocean currents eroding away the ocean floor

• The collapse of an empty magma chamber in a large volcano

• Excessive boat traffic disrupting the normal sedimentation process

• Two tectonic plates colliding and one plunging below the other

One part of California is on the Pacific Plate, while the remainder of the state is on the North American Plate. One plate is sliding past the other. This is what kind of boundary?

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

• Diversion Boundary

When the sea floor spreads apart, volcanoes and ridges are formed because -

• Sediments are deposited where the floor spreads, building ridges

• As the plates pull apart, magma moves to the surface, building ridges

• Ocean water pushes down on the surrounding sea floor, pushing up ridges

• Underwater earthquakes lift the sea floor into long ridges

Which of the following is not considered a result of the movement of tectonic plates?

• Earthquakes

• Mountain ranges

• Increased volcanic activity

• Karst topography

The Earth's mantle is made up of very hot material that rises to the top of the mantle, cools, then sinks, reheats, and rises again, constantly repeating the cycle. This action, which causes the Earth's crust to move, is known as -

• Convection Currents

• Magnetic Fields

• Hot Spots

• Advection Forces

The type of plate boundary where two plates move towards each other is a -

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

• Diversion Boundary