Choose the letter of the best answer that describes the changes on Earth's surface as a result of an earthquake. 1. Why do earthquakes occur? A. due to movement of materials beneath the earth's surface. B. crustal plates float over liquid rock. C. earth's crust is thinning out considerably. D. loose rocks fall from the mountainsides. 2. What word can be used to define movement of an earthquake? A. sliding C. trembling B. bumping D. cracking 3. Which type of earthquake usually happens in in the Philippines? A. tectonic C. both tectonic and volcanic B. volcanic D. fault 4. Which feature is not connected to earthquakes? A. fault C. trench B. mountain D. plates 5. Which one is used to measure magnitude of an earthquake? A. Mercalli Intensity C. Richter Scale Scale D. tilt meter B. thermometer
