Twisted by tornadoes

"Tornadoes are some of the most dangerous forces of nature on Earth. With winds that swirl at up to 300 miles per hour, these incredible storms can destroy whatever is in their path. In this ... fact-filled book, students will learn how scientists predict and measure tornadoes. Readers will learn how people prepare for tornadoes and how they stay safe during and after one of these powerful storms hits."--Publisher.