5 Written Questions

1. a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust
2. the soft layer of the mantle on which the lithosphere floats
3. a deep valley that forms where two plates move apart
4. a dense sphere of solid iron and nickel at the center of the earth
5. the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary

5 Matching Questions

1. basalt
2. sea-floor spreading
3. mantle
4. mid-ocean ridge
5. divergent boundary

1. a a plate boundary where two plates move away from each other
2. b the process by which molten material adds new oceanic crust to the ocean floor
3. c an undersea mountain chain where new ocean floor is produced; a divergent plate boundary
4. d a dark, dense, igneous rock with a fine texture, found in oceanic crust
5. e the layer of hot, solid material between Earth's crust and core

5 Multiple Choice Questions

1. a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
   1. mid-ocean ridge
   2. plate
   3. granite
   4. deep-ocean trench
2. a layer of molten iron and nickel that surrounds the inner core of Earth
   1. inner core
   2. convection
   3. outer core
   4. pressure
3. the force exerted on a surface divided by the area over which the force is exerted
   1. pressure
   2. plate
   3. crust
   4. granite
4. the hypothesis that the continents slowly move across Earth's surface
   1. conduction
   2. convection
   3. continental drift
   4. convection current
5. a usually light colored igneous rock that is found in continental crust
   1. mantle
   2. density
   3. granite
   4. plate

5 True/False Questions

1. plate tectonics → a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust

   True        False

2. sonar → a device that determines the distance of an object under water by recording echoes of sound waves

   True        False

3. seismic waves → a dense sphere of solid iron and nickel at the center of the earth

   True        False

4. convergent boundary → a plate boundary where two plates move toward each other

   True        False

5. conduction → the transfer of heat by movement of a fluid

   True        False