Name Grade and Section: INSTRUCTION: Read each item carefully. Choose the best answer from the choices given after each item. Encircle ONLY THE LETTERS of your choice 1 What is the main cause of seismic waves? A Earthquake B. Thunder C. Traffic D. Volcano 2 What type of wave is Pwave? A Electromagnetic C. Transverse B Longitudina D Ultrasonic 3. Why is there an abrupt change in the speed of seismic waves as they travel inside the Earth? It is because seismic waves are A colding B. overtaking the compressional waves C. passing through e material with the same density D going into a material with different properties and densities 4 Which of the following travels the fastest and is detected first in the seismic station? A Love wave C Primary wave B Surface wave D Secondary wave 5. Which kind of waves does NOT travel through a liquid? A Love C. Secondary B Primary D Surface 6. What type of seismic waves are responsible for a destructive earthquake? A Love C Secondary B Primary D Surface 7. How do rock particles move during the passage of primary waves? A no motion Bin circular motion direction of the waves​