1. a. We often hear a hurricane described as a Category 3 or a Category 4 storm. What scale is used to measure hurricanes? b. How does a Category 2 hurricane differ from a Category 4 hurricane in terms of wind speed and level of damage? 2. a. What does the Fujita Scale measure? b. What are the wind speeds for F-4 and F-5 tornadoes, and how much damage do F- 4 and F-5 tornadoes cause? 3. a. What two scales are used to measure earthquake magnitude? b. What level of damage is expected from 7.0 Richter Scale earthquake? c. What type of damage typically occurs when an earthquake measuring "8" on the Modified Mercalli Scale occurs? 4. a. What scale is used to measure the size of volcanic eruptions? b. What two characteristics of a volcanic eruption does the Volcanic Explosivity Index consider?