What are two bad things about plate tectonics and how did plate tectonics cause these events?
Volcano eruptions and earthquakes. When plates bump into each other, a source of energy is created deep inside the earth called a focus. It causes a surface source, called the epicentre, to create three kinds of waves: Primar (P) waves, Secondary (S) waves, and surface waves. The P waves go first. Then the secondary, and finally the surface, which cause the most damage. That’s how earthquakes are made. Volcanoes are created when two plate boundaries, or faults, converge, causeing the land to move in one of three different ways: moves downward (normal fault), moves upward (reverse fault), or slides past each other (strike-slip or transform fault). When a volcano erupts, the lava comes out of openings called vents. How does it erupt? Well, the sliding plates move the magma upward, until it reaches the top and comes out as lava.
