Plate Tectonic Theory

Two plates come together or collide at what boundary?

• Convergent

• Divergent

• Transform

Two plates spread or move apart at what boundary?

• Convergent

• Divergent

• Transform

Two plates slide past each other at what boundary?

• Covergent

• Divergent

• Transform

New oceanic crust (sea floor) is created at this boundary.

• Divergent Oceanic

• Divergent Continental

• Convergent Oceanic

• Transform

The process where oceanic crust slides under another plate and is melted is called ___________.

• seafloor spreading

• subduction

• continental drift

• recycling

What kind of plate boundary is shown here?

• divergent
• convergent
• transform
• submergent

What kind of plate boundary is shown here?

• divergent
• convergent
• transform
• subducting

What kind of plate boundary is shown here?

• divergent
• convergent
• transform
• strike slip

In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?

• The strong ocean currents are undermining both areas causing earthquakes.

• Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.

• Both areas are subjected to strong ocean wind and waves that causes earthquakes.

• Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.

Geologists have long recognized that earthquakes are not randomly distributed on Earth but occur in concentrated areas that coincide with __________ and provide evidence for the theory of ___________ .

• mountain ranges; fault zones.
• continental borders; supercontinents.
• plate boundaries; plate tectonics
• areas of liquid magma; sea floor spreading.