Q. A ______ is a section of the lithosphere that slowly moves over the asthenosphere, carrying large slabs of continental and oceanic crust.

Q. A break in Earth's crust along which rocks move is called a ________.

Q. _________ are vibrations that travel through Earth carrying the energy released during an earthquake.

Q. What is the name of the single landmass that began to break apart 200 million years ago?

Q. The movement of fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another is _____________.

Q. The process by which molten material adds new oceanic crust to the ocean floor is called ___________.

Q. What is an undersea mountain chain where new ocean floor is produced?

Q. A __________ is a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.

Q. What is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary?

Q. _____________ is a plate boundary where two plates move away from each other.

Q. _____________ is when two plates move toward each other.

Q. A _____________ is when two plates move past each other in opposite directions.

Q. A _________ is a valley that forms where two plates move apart.

Q. ___________ is the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.