The Topic: 

Easier - Tornadoes are violent, whirling funnel-shaped windstorms that usually travel over land. When a tornado touches the ground, it can cause great destruction in its narrow path.
Harder - Tornadoes, often called twisters, are the most violent of thunderstorms. A tornado over a body of water is called a waterspout.
Tornadoes occur when a warm, humid air mass meets with a cool, dry air mass. This collision sometimes results in a powerful, swirling column of air. The tornado's swirling winds can exceed 300 mph. Tornadoes cause much damage by this sheer force of wind, but they also have a strong updraft that can lift and carry objects. Fortunately, most tornadoes are relatively weak; only a few are devastating.
 Storm Spotter's Guide: An Illustrated Guide to Identifying Severe Storms
Learn all about thunderstorms, tornadoes and other severe weather.
Tornadoes - Going Around in Circles (the Why Files)
This website includes information about what causes tornadoes, how they get their energy, a twister glossary, quiz, and more.
Tornado Project Online!
This site provides gale-force amounts of information on tornadoes including tornado chasing, oddities, myths, safety, and accounts.
This page gives an in depth view into all aspects of tornadoes.
 Visit a few of the sites below, then pick and complete one of these tornado projects:
Prepare for a Tornado. Visit Twisters: Destruction From The Sky and Tornadoes - Going Around in Circles. Then create a procedure for your family to follow in the event that a tornado was in your area. Would that procedure need to be changed if you were in a different locale such as your school, in a car, or at the mall? Compare your ideas with those at Tornado Safety Tips Brochure. Now revise your safety procedures.
Create a Tornado in a Jar. Visit Tornado in a Bottle or Tornado in a Jar and then create your own tornado experiment. Write a journal account of the activity.
Write a Tornado Story. Create a short story that involves a tornado.
Research Tornado Occurrences. Using the information found at the sites below, create a map of the U.S. that indicates the ten states that have the most tornadoes. Has your community had a tornado? Visit a local library and see if you can find records and information about local tornadoes.
Complete a Tornadoes Webquest. Select or adapt from the procedures found one or more of these webquest project sites:
Websites For Kids By Kids
 Twisters: Destruction From The Sky (ThinkQuest Junior site)
Here you will find photos, stories, ways to save your life, and weird facts about tornadoes.
This school site contains tornado facts, pictures, charts, and links on the cause and effects of tornadoes.
More Twister Information
Introduction to Tornadoes from the Movie 'Twister'
This site has good tornado information. Be sure to explore all the links.

Tornado and Storm Research Organisation
Read tornado information from the United Kingdom, which has the highest frequency of reported tornadoes per unit area in the world.
Tornado Safety Tips Brochures
When a tornado is coming, you have only a short amount of time to make life-or-death decisions. Advance planning and quick response are the keys to surviving a tornado.
Tornado Warning!
Read current dispatches from tornado stormchasers, and hear about the art, science, and danger of twister-chasing.
This website is devoted to tornado and storm chasing, storm spotting, storm chasers, severe weather research, weather photographs and storm safety.
Tornado Information Index from USA Today
Get the latest severe weather watches and warnings plus lots of tornado information.
Tornadoes-- Weatherpix
Site devoted to severe weather education and photography.
Similar and Related Websites:
2) Tornadoes
3) Wall Clouds
Tornado Chasers Home Page--Kansas
Source for storm spotters on the subject of severe weather & tornadoes.
Turn! Turn! Turn! (Scientific American)
Learn how scientists unravel the twisted ways of tornadoes.
What creates a tornado?
Brief article explains the environmental conditions that cause a tornado to happen.
What is a Tornado? at
A tornado is a powerful storm which is created when moist, warm air gets trapped beneath a stable layer of cold, dry air within layer of warm, dry air. Learn more at this site.
Websites for Teachers
Tornadoes (Grade 4)
This lesson plan is about the formation of a tornado, their destructive nature, and related safety precautions.
Twister! Understanding and Surviving Tornadoes (Education World)
Here is a lesson planning article about the meteorological events that signal the possibility of a tornado and what safety measures you and your students can take to survive.
wind shear
tornado warning
damage path
tornado watch
storm chaser
tornado alley
National Weather Service
Doppler radar
air mass
air pressure
towering cumulus
suction vortice
wall cloud
rain-free base
tornado alert
Created by Annette Lamb and Larry Johnson, Updated by Nancy Smith, 10/01