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Social Function : To Describe the way things are, with reference to range of natural, man-made and social phenomena in our environment.
Generic Structure :

General Classification => tells what the phenomenon under discussion is.

Description => tells what the phenomenon under discussion is like in terms of (1) parts, (2) qualities, (3) habits or behaviors, if living; uses, if non-natural.

Significant :

- Focus on generic participants

- Use of relational processes to state what is and that which it is

- Use of Simple Present Tense (Unless extinct)

- No temporal sequence


Generic structure :
General Classification : Tornado is a very powerful column of winds which spirals around a center of low atmospheric pressure.
Description :

1. Story of tornado
2. Speed of tornado
3. Diameter of tornado
4. Forming  of tornado

Tornadoes 

What is a tornado?

Tornadoes are known as one of the most damaging disasters. What is the description of tornadoes? A tornado is a very powerful column of winds which spirals around a center of low atmospheric pressure. A tornado will look like a large black funnel which hangs down from a storm cloud.

The name "tornado" derives from the Latin "tonare". It means "to thunder." While the Spanish developed the word into "tornear" which means "to turn or twist". This is why a tornado is sometimes called twister or cyclone.

The winds inside a twister can spin around at speeds up to 500 miles an hour, but it usually travels at roughly 300 miles an hour. This speed twisting makes a tornado the most dangerous storm.

The average tornado has a diameter of about 200 to 300 yards. The smaller tornadoes are known as satellite tornadoes. These small offspring, about 50 yards across, can be very fierce and do lots of damage.

The forming of a tornado can be very quick. Sometimes it can form in a minute or less. A tornado can travel across the ground at high speeds, then it can suddenly vanish. Most tornadoes last less than twenty minutes and travel less than 15 miles. However, the super storms sometimes travel over 100 miles before they are exhausted.

Iruzuka~~