........ Tornadoes are powerful, swirling winds. Tornadoes can tear roofs off of houses. They can . (menghancurkan) brick buildings. Tornadoes can pick up cars and trucks. People can be badly hurt or killed by flying wood, glass, and other things can pick u'Chembusan) around in a tornado . Tornadoes come from ......... (besar) thunderstorms. Tornadoes drop down from the bottoms of storm............ (awan). Tornado winds blow in a circle. You can't normally see wind, but you can often see a tornado because its strong winds pick up ............. (debu) and dirt. A tornado looks like a big, dark .......... (cerobong) coming from the bottom of a storm cloud. Some tornadoes look like a swinging elephant trunk. They sound like a freight train going by Tornadoes cause ............ (kerusakan) when the bottom of the funnel touches the ground (tanah). Tornadoes can be huge. The biggest tornadoes are almost 1 mile (almost 2 kilometers) across. The average tornado is about 160 feet (about 50 meters) across. Tornado winds ........ (berputar) very fast. They whip around at speeds from 75 miles per hour (120 kilometers per hour) to almost 300 miles per hour (500 kilometers per hour). Sometimes a tornado almost stands still in one place, but tornadoes usually move. They can move forward at ............. (kecepatan) up to 70 miles per hour (110 kilometers per hour).It is hard to study tornadoes. Scientists never know quite when or where they will (muncul), and they move fast. In 1971, a scientist named Theodore Fujita made up a (skala) to tell how powerful a tornado is. His Fujita scale ranks tornadoes by how much damage they do. The scale goes from FO to F5. Weak tornadoes are FO and F1. Weak tornadoes may damage ............ (cerobong asap) and break tree ............. (ranting). Powerful F5 tornadoes can pick up houses off the ground and strip the bark off of trees. Scientists are trying to learn more about tornadoes. They want to get better at predicting tornadoes. Better predictions would .......... (memperingatkan) people early. Early warnings about tornadoes could ............... (menyelamatkan) many ...... .... (nyawa).​