Atornado is believed to be caused by two levels of rotating air traveling in different directions and/or speeds.
a. true
b. false

The statement that a tornado is believed to be caused by two levels of rotating air traveling in different directions and/or speeds is true. Correct A This funnel-shaped windstorm of air extends from a thunderstorm to the ground. When cold,dry air mass meets warm,moist air mass, they create instability in the atmosphere.Once the air begins to rise and becomes saturated, it will continue rising to great heights to produce a thunderstorm cloud, if the atmosphere is unstable

answer; i believe that the correct answer is (the explosion of a nearby star(supernova);

just took the test the answer is b.