11. Which of the following best describe the magnitude? a. measure of how strong an earthquake is c. expressed using roman numerals b. an instrument that measures earthquake d. expressed in hindu-arabic numerals 12. When does a tsunami happen? a if a fault suddenly moves in a body of water c. when huge water animals make big waves b. when the typhoon is so strong d. if a meteor hits the ocean 13. What are the components needed for a typhoon to form? a warm air b. moist air c. heated air d. cool air 14. To be fully prepared for tropical cyclones, what things you should bring to the evacuation area? a. Emergency Kit b. First Aid Kit c. Batteries only d. Canned Goods a.​