Name

Which layer of the Earth is found between the core and crust?

• mantle
• upper mantle
• mandible
• asthenosphere

The name of the supercontinent that is believed to have included all the landmasses on the Earth before plates shifted apart.

• Pandora
• Plato
• Pangea
• Panamerica

Rigid blocks of the lithosphere, known as ______________, move horizontally across the Earth's surface.

• Tectonic plates
• continents
• cores
• mountains

The maps below show the positions of two continents at two different times. The movement of the two continents as shown may best be explained by

• a. volcanic eruptions
• b. magnetic changes
• c. coastal flooding
• d. plate tectonics

What do scientists believe is the force behind the plate tectonics theory?

• a. the sun’s gravity
• b. gravity slab pull
• c. convection currents
• d. rotation of Earth on its axis

Examine the diagram. Which of the following best describes the age of the ocean floor?

• a. Oldest at Points A and B, youngest in the middle
• b. Oldest at Point A, youngest at Point B
• c. Oldest at Point B, youngest at Point A
• d. Oldest in the middle, youngest at Points A and B

What type of plate boundary is shown in the diagram?

• a. convergent
• b. divergent
• c. transform
• d. uniform

Look at the part of the diagram labeled with a star. What process is occurring here?

• a. uprising of convection currents
• b. subduction of the oceanic plate
• c. subduction of the continental plate
• d. sea-floor spreading

What will happen to the oceanic crust plate?

• a. it will become a part of the hot, molten mantle
• b. it will go above the continental crust
• c. it will undergo the weathering process
• d. it will become solid rock