What is the Meaning & Definition of Thunder

Very strong characteristic of thunderstorm DIN

Thunder is one of the most common bad weather phenomena, i.e., it's a very strong sound, a roar of wide sound characteristic of thunderstorm. When we heard the sound of Thunder is a clear advance that what will follow is a heavy rain.

Result of the shock wave generated when lightning heats the air between the clouds that mobilizes

That characteristic sound of which you speak is the result of the shock wave generated spontaneously when lightning heats the air between the clouds that moves. It is estimated that the heat would be about thirty thousand degrees Celsius.
That extremely hot air grows in volume and extends at a very rapid rate and end up mixing with cold air, when this meeting as opposing aires is that it will sound fearful Thunder noise.

It tends to cause fear, especially in children

And we say fearful because it is certainly very strong and being associated with a heavy rain and accompanied by a thunderbolt is that often people cause fear, or at least some concern to hear it.
Small e.g. Thunder tends to produce a huge fear to hear it that can shoot from cries, cries and even requests for assistance to parents. Children normally have fear strong storms and everything they bring unique characteristics: Thunder, lightning, lightning. A common reaction to the aforementioned of the cries and the cries is the run away and hide in a place that is considered safe, such is the case of the closet or room for MOM and dad.
Another issue that comes with thunder, lightning and rain is a great darkness of the sky, that clear, also amount to generate a climate that gives true AWE in who can appreciate it.
Boom that produced the shot of a gun or a firework
By extension the term of Thunder is also used a lot in the colloquial language to designate the noise or boom produced the shot of a gun or failing that simile noise that originates a firework after its on.
Article contributed by the team of collaborators.