2.  1. Only one or two earthquakes occur every year. (Choose only one answer) true false

3.  2. Plate movement is caused by heat-related movement in which layer of the earth? (Choose only one answer) the crust the mantle the inner core the outer core

4.  3. The large supercontinent that existed about 200 million years ago was called _____. (Choose only one answer) Pangaea Polynesia Patagonia Panamerica

5.  4. The seafloor spreads as new material rises from the mantle and cools. This results in an underwater mountain range called the _____. (Choose only one answer) Himalayas Mid-Ocean Ridge Marianas Trench Hawaiian Islands

6.  5. Sometimes, plates slip past one another, causing earthquakes. Such plate boundaries are called _____. (Choose only one answer) divergent boundaries transform boundaries convergent boundaries mid-continental boundaries

7.  6. Earthquakes often occur deep underground. The place on the surface above the spot where the earthquake occurs is called the _____. (Choose only one answer) focus P wave S wave epicenter

8.  7. An earthquake's seismic waves are measured using a tool called a seismometer. The strength of the quake is measured according to a special scale called the _____. (Choose only one answer) focal point magnitude Richter scale Celsius scale

9.  8. The San Andreas Fault in California lies near several major cities. Which is one major city on the fault line? (Choose only one answer) Seattle Sonoma Sacramento San Francisco