If you are asking whether a tornado can change its shape or appearance then yes. It is quite common for a tornado to change in shape, size, and intensity.
Very likely, yes. Vancouver was hit by an F1 tornado in 2008.
Tornadoes can merge, but it is rare. Most often it occurs when one large tornado absorbs a smaller one.
If by that you mean a tornado with a rainbow near it then yes, sometimes rain falls very near a tornado, which can form a rainbow under the right conditions
Partially. A tornado warning means that a tornado is likely to form or already has formed.
well i think a tornado can form anywhere
No. A tornado warning means that a tornado is likely to form or has already been spotted.
No. No tornado stronger than F5 has ever been recorded.
Thunderstorms do not turn in tornadoes, but they can produce them. In fact all tornadoes form in thunderstorms.
a tornado in the form of fire
No. An F5 is the strongest tornado that is able to form.
They form in Tornado Alley for a couple of reasons. One of them is because of the weather. It is humid there. But, tornadoes can also form outside of Tornado Alley. They can form anymore!
Yes. A tornado watch simply means that general conditions are favorable for tornadoes to form. A tornado warning means that a tornado has been detected or may form at any moment.