CA2 Review - Plate Tectonics

The picture to the right shows a satellite image of a crater, a large hole in the ground, typically caused by a large impact of an object like an asteroid. The crater was found in a dry, arid location in East Texas. Which of the following correctly describes how the crater will change over time?

• The crater, because its closer to the center of the Earth, will likely turn into a volcano

• The crater will become less deep as erosion destroys the rim

• The crater will get wider and wider as lava fills it

• The crater will deepen as rains completely fill it

The satellite picture to the right is an image of Port Houston, a popular channel for boats to travel through on their way in and out of the Gulf of Mexico. To clear the channel, boats often take sand from the bottom of the channel and move it to the beaches around the port. If sand was NOT moved from the bottom to the beaches, what might happen to the channel over time?

• The beaches would become wider and the channel would become deeper

• The beaches would become narrower and the channel would become shallower

• The beaches would stay the same, but the channel would become shallower

• The beaches would become wider, but the channel would stay the same

The photograph shows mountains in the Andes range in South America. Which statement describes the geologic process that is most likely responsible for the formation of these mountains?

• They are along a transform plate boundary that is no longer active, so erosion is creating deep valleys

• They are along a transform plate boundary in which plate are currently moving side by side, causing earthquakes and faults

• They are along a plate boundary in which plates are currently converging, causing uplift and steep slopes

• They are along a plate boundary in which plates diverged in the distant past, causing rock to build up

What happens during the process of dredging?

• Sand is taken from the beaches and added to the bottom of the channel. The beaches get narrower and the channel gets shallower

• Sand is taken from the bottom of the channel and added to the beaches. The beaches get narrower and the channel gets shallower

• Sand is taken from the bottom of the channel and added to the beaches. The beaches get wider and the channel gets deeper

• Sand is taken from the beaches and added to the bottom of the channel. The beaches get wider and the channel gets shallower

Why are shipping channels dredged?

• To make them shallower so ships can get through

• To make them deeper so ships can get through

• To destroy the channel

• To make a new channel

What plate boundary occurs when plates move TOWARDS each other?

• Convergent

• Divergent

• Transform

• None of the above

What plate boundary occurs when plates move AWAY FROM each other?

• Convergent

• Divergent

• Transform

• None of the above

What plate boundary occurs when two plates slide PAST each other?

• Convergent

• Divergent

• Transform

• None of the above

Transform boundaries cause...

• mountain ranges to form

• rift valleys to form

• earthquakes and faults to occur

• hurricanes to form

Sometimes, convergent boundaries cause volcanoes to form in a shape shown to the right. Based on the shape, we could call this...

• A volcano line

• A volcano arc