1. Tornadoes are rapidly spinning tubes which touch both the ground and a cloud above.
Image courtesy sciencekids.co.uz.
2. Not all tornadoes are visible, but many have a rapid rotation and high wind speeds which form a visible funnel of condensed water.
Topeka Tornado of 1966 courtesy noaa.gov.
3. Wind speeds range from less than 100 miles per hour to over 300 miles per hour.
Image courtesy allvoices.com.
4. Many tornadoes travel a few miles and peter out, but some travel over 100 miles.
Tri-state tornado of 1925 courtesy www.psmag.com.
5. The Fujita Scale measures tornadoes, with an F0 being the mildest and an F5 being the deadliest.
Image courtesy modernsurvivalblog.com.
6. The Tri-State Tornado (Missouri, Illinois, Indiana) was the deadliest in American history, killing 695 people.
Image courtesy upload.wikimedia.org.
7. Twelve hundred tornadoes hit Tornado Valley each year on average, mainly in Texas, Kansas, Oklahoma and Florida.
Image courtesy whyfiles.org.
8. Southern hemisphere tornadoes rotate clockwise while northern hemisphere tornadoes rotate counterclockwise.
Image courtesy nasa.gov.
9. Tornadoes over the water are called waterspouts.
Image courtesy noaa.gov.
10. Weather radars are used to detect tornadoes and give the public advance warning.
Image courtesy upload.wikimedia.org.
Source: www.sciencekids.co.nz
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