Tornadoes are measured by the _____

• A. Fujita scale
• B. Richter scale
• C. Beaufort scale
• D. F-scale

Answer: (D)

Tornado intensity is judged from the damage they cause, since direct wind-speed measurements inside a tornado are hard to obtain. The F-scale is the traditional rating system that assigns a number from F0 to F5 based on the destruction observed, giving an approximate sense of wind strength. It was developed by T. Fujita, and you’ll also see it referred to as the Fujita scale; in modern practice the Enhanced Fujita scale is used, but the older F-scale remains the familiar name in many contexts. The other options don’t describe tornado damage: the Richter scale measures earthquake magnitude, and the Beaufort scale estimates general wind speeds, not tornado-specific damage.