Seafloor Spreading

When looking at mid ocean ridges the oldest rocks are

• at the top of the ridges

• at the bottom of the ridges

• inside the mid ocean ridges

• farthest away from the mid ocean ridges

Sea floor spreading

• creates new crust

• destroys old crust

• is a rapid process

• has no effect on the oceanic crust

The zone where one plate slides under another is called the

• Convergent zone
• Subduction zone
• Transform zone
• Mantle zone

What technology was used during WWII to detect enemy submarines and produce the first map of the seafloor?

• Sonar
• Radar
• GPS

Undersea mountain range.

• Rift
• Mid-ocean ridge
• seafloor spreading
• Continental drift

Theory that magma rises to surface at mid-ocean ridge & cools to form new seafloor

• Continental drift

• Plate tectonics

• Volcanoes

• Seafloor spreading

Boundary between two plates moving toward each other

• Transform fault boundary

• Divergent boundary

• Convergent boundary

• Strike-slip fault

Which of the following causes Earth's tectonic plates to move?

• Energy from the Sun
• Magnetic Pole Reversal
• Convection currents in the mantle
• Faults in Mountain Ranges

What are the two types of crust?

• continental and oceanic
• ocean and basin
• lower and upper
• thick and thin

What is Pangaea?

• the name of a German scientist
• the name of the super-continent that existed millions of years ago
• another name for continental drift
• the name of an ancient fossil