What+Causes+a+Tornado?

==Tornadoes form inside thunderstorms, clouds that are called cumulonimbus clouds. These clouds are caused when warm air and cold air collide with each other. These clouds are very tall so a lot can happen inside of them. When the warm air starts moving upward in the cloud (heat rises, cold falls) the air can start circling around. If this becomes powerful enough, a tornado can be produced. This does not happen with all thunderstorms, a lot of factors have to take place cold fronts, jet streams, and air pressure all have to be in a certain condition.== media type="custom" key="9273272" Picture from Muriel Martin School system