Flashover

1. Flashoveroccurswhenflamesflashovertheentiresurfaceofaroomorarea.

2. Theactualcauseofflashoverisattributedtothebuildingofheatfromthefireitself.

3. Asthefirecontinuestoburnallthecontentsofthefireareaaregraduallyheatedtotheirignitiontemperatures.

4. Whentheyreachtheirignitionoccursandtheareabecomesfullyinvolvedinfire.

5. Thisactualignitionisalmostinstantaneousandcanbequitedramatic.

6. Aflashovercanusuallybeavoidedbydirectingwatertowardtheceilinglevelandtheroomcontentstocoolmaterialsbelowtheirignitiontemperatures.

6. Match each of the following terms with its definition:

To set smth. on fire	Something is burning and being damaged or destroyed by an uncontrolled fire.
To be on fire	To start burning in order to damage or destroy smth.
Fume	A substance or mixture of substances in a gaseous state used to produce light and heat
To inflame	Is the light that comes from a fire that you have lit.
Gas	To give off light suddenly or in transient bursts
Firelight	strong and unpleasant or harmful (= dangerous) gases, smells or smoke.

7. Put the verbs in brackets into the correct form.

1. Hundreds of valuable books (to go up) in smoke if this library (to catch) a fire.

2. If forest rangers (not to act) quickly, the fire (to get out) of control.

3. Often airplane patrols look for smoke. If a fire is spotted before it (to start) to spread, it (to be put out) quickly. But if the fire (to be) too big, fire fighters are either (to fly in) by helicopter or (to parachute) to the site of the fire.

4. The fire (to move) by jumping from tree to tree. When it (to reach) the fire line it (to have) no place to go and (to stop).

5. Then for days and sometimes weeks afterward, fire fighters (to go) over the area until (there be) no more burning embers.

8. Fill in the missing prepositions and adverbial particles. Find some more facts about fire destruction.

for(2) of ( 4) in (4) from

Fire Destruction.

One of the worst fires (...) the United States was the Chicago, Illinois, fire (...) 1871. (...) three days it burned, destroying about 18,000 buildings (...) an area of three square miles (...) the centre (...) the city. About 100,000 people lost their homes and 250 lost their lives. On the same day that the Chicago fire started, another the worst fires (...) United States history began (...) Peshtigo, Wisconsin. (...) 24 hours the combination (...) a forest fire and a violent windstorm took the lives (...) 1,500 men, women, and children.

Speaking

1. The article you have read tells you about some problems in kindling fire. Get ready to discuss these problems. Causes of Fire

Smoking and matches usually cause the greatest number of fires each year in the United States. However, serious losses result from blazes of electrical origin. Other leading sources of building fires—in descending order of number of alarms—include heating plants and cooking devices, open flame and sparks, children and matches, flammable liquids, and rubbish.

Work in groups to prepare and act out a role play “Fire – friend or enemy?”.

Role 1.Teacher of chemistry: you are to make short report about nature of burning

Role 2. Methalurgist: you are to speak about burning used in industry.

Role 3. School fire inspector: you are to make short report about the most typical causes of fire.