Final answer:
Tornadoes are powerful and destructive weather phenomena that form from rotating air, usually in a region called 'tornado alley' in the central United States.
Step-by-step explanation:
Tornadoes are powerful and destructive weather phenomena that descend from clouds in funnel-like shapes, spinning violently and producing winds as high as 500 km/h.
Tornadoes form in severe thunderstorms called supercells, which have a rotating column of air. The difference in wind speeds between the strong cold winds higher up in the atmosphere and weaker winds from the Gulf of Mexico causes the rotating column of air to spin around a vertical axis, creating a tornado. They are most commonly found in an area known as 'tornado alley' in the central United States.