Earth’s crust is broken into pieces that interact with each other in a variety of ways. A (4) consists of two plates that move away from each other. This forms a (5) between the two plates where (6) will rise up and form new crust. When two tectonic plates come together at a (7), mountains are formed. The third type of boundary occurs when tectonic plates slide past each other. The San Andreas Fault is an example of a (8).