Plate Tectonics

In sea-floor spreading, molten material rises from the mantle and erupts

The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as _______

Most geologists think that the movement of Earth’s plates is caused by _______

A place where two plates slip past each other, moving in opposite directions, is known as a _______

Scientists think that convection currents flow in Earth’s

The place where two plates come together is known as a _______

Below is a picture of sea-floor spreading. How are the ocean crusts moving?

The San Andreas Fault in California is known as an active earthquake area. What type of

boundary is it?