English English (Honeycomb)(Honeycomb)

Class:- 7Class:- 7thth

School:- K.V. SARNISchool:- K.V. SARNI

BHOPAL REGIONBHOPAL REGION

Sub. Teacher:-Sub. Teacher:-

R.K.PANDOLER.K.PANDOLESTARTSTART

IndexIndex

INDEX INDEX FIRE FRIEND AND FOEFIRE FRIEND AND FOE

Fire used by early manFire used by early man

Three things needed to put out fireThree things needed to put out fire

Three thins mainly needed to produce fireThree thins mainly needed to produce fire

FIRE USED BY EARLY FIRE USED BY EARLY PEOPLEPEOPLE

Early man didn’t know what fire was, but he Early man didn’t know what fire was, but he must have seen the damage it could cause. must have seen the damage it could cause.

He must have watched lightening and He must have watched lightening and volcanoes long before he began to use fire volcanoes long before he began to use fire himself. Fire was powerful and dangerous, himself. Fire was powerful and dangerous,

and he was frightenedand he was frightened..

Fire may have puzzled early man but we Fire may have puzzled early man but we now know that fire is the result of a chemical now know that fire is the result of a chemical

reaction.reaction.

INDEXINDEX

A FOREST FIREA FOREST FIRE

THREE THINGS USED THREE THINGS USED TO MAKE FIRETO MAKE FIREThree things are needed to make fire-Three things are needed to make fire-

Fuel, oxygen and heat. Wood, coal, cooking gas and petrol Fuel, oxygen and heat. Wood, coal, cooking gas and petrol are some examples of fuel. Oxygen comes from air. That is are some examples of fuel. Oxygen comes from air. That is why, when we blow on smoldering paper, it often bursts into why, when we blow on smoldering paper, it often bursts into flames. The third thing needed to make fire is heat. Fuel and flames. The third thing needed to make fire is heat. Fuel and oxygen do not make fire themselves, or else a newspaper or oxygen do not make fire themselves, or else a newspaper or

a stick lying in the open would catch fire on it’s own. To burn a a stick lying in the open would catch fire on it’s own. To burn a piece of paper or wood, we heat before it catches fire, We piece of paper or wood, we heat before it catches fire, We

generally do it with a lighted match. Every fuel has a generally do it with a lighted match. Every fuel has a particular temperature at which it begins to burn. This particular temperature at which it begins to burn. This

temperature is called the ‘Flash Point’ or ‘Kindling temperature is called the ‘Flash Point’ or ‘Kindling temperature’ of the fuel temperature’ of the fuel

FIREBOATSFIREBOATSFireboats come to the Fireboats come to the rescue of a burning tanker rescue of a burning tanker off the coast of Mexico. off the coast of Mexico. Using the unlimited water Using the unlimited water supply that surrounds supply that surrounds them, these boats are able them, these boats are able to pump thousands of to pump thousands of liters of water per minute liters of water per minute to fires as far as 60 meters to fires as far as 60 meters (200 feet) away. Powerful (200 feet) away. Powerful engines draw water engines draw water through compartments through compartments called sea chests in the called sea chests in the bottom of the boat; then bottom of the boat; then the water is pumped the water is pumped through pipes and hoses through pipes and hoses to the burning tanker and to the burning tanker and oil.oil.

FOREST FIRE FIGHTINGFOREST FIRE FIGHTING

INDEXINDEX

Three main ways to put Three main ways to put out fireout fire

1- Just as three things are needed to start 1- Just as three things are needed to start a fire, there are three main ways in a fire, there are three main ways in

which a fire can be put out. In each, one which a fire can be put out. In each, one of the three things needed for burning is of the three things needed for burning is

taken away.taken away.For example, we can take away the fuel. If For example, we can take away the fuel. If

the fire has no fuel to feed on, no the fire has no fuel to feed on, no burning can take place. We often let a burning can take place. We often let a fire die out simply by not adding more fire die out simply by not adding more

fuel to itfuel to it

2- The second way of putting out a fire 2- The second way of putting out a fire is to oxygen from reaching it. No is to oxygen from reaching it. No supply of oxygen means no fire. supply of oxygen means no fire.

Small fires can be put out or Small fires can be put out or smothered with a damp blanket or a smothered with a damp blanket or a

sack . This stops oxygen reaching sack . This stops oxygen reaching the burning material. Sometimes the burning material. Sometimes

carbon dioxide is used to extinguish carbon dioxide is used to extinguish fire. It does not allow oxygen to fire. It does not allow oxygen to

reach the burning material . reach the burning material .

3-The third way of putting out fire is 3-The third way of putting out fire is to remove the heat. If the to remove the heat. If the

temperature can be brought down temperature can be brought down below the flash point, the fuel stops below the flash point, the fuel stops

burning. We blow on a burning burning. We blow on a burning matchstick or a candle to put it out. matchstick or a candle to put it out. In doing so, we remove the hot air In doing so, we remove the hot air around flash point, and the candle around flash point, and the candle

goes out. Sometimes water is goes out. Sometimes water is sprayed on a fire. It absorbs heat sprayed on a fire. It absorbs heat

from the burning fuel and lowers the from the burning fuel and lowers the temperature. The blanket of water temperature. The blanket of water also cuts off the supply of oxygen, also cuts off the supply of oxygen,

and the fire is extinguishedand the fire is extinguished..

Fire ExtinguisherFire Extinguisher

• portable device used to put out fires of limited size. Such fires are grouped into four classes, according to the type of material that is burning. Class A fires include those in which ordinary combustibles such as wood, cloth, and paper are burning. Class B fires are those in which flammable liquids, oils, and grease are burning. Class C fires are those involving live electrical equipment. Class D fires involve combustible metals such as magnesium, potassium, and sodium. Each class of fire requires its own type of

fire extinguisher.

A PICTURE OF FIRE A PICTURE OF FIRE EXTINGUISHEREXTINGUISHER

All workplaces are All workplaces are rquired to have fire rquired to have fire

extinguishers, which extinguishers, which have to be clearly have to be clearly

labelled and labelled and accessible. Usually a accessible. Usually a

notice is placed above notice is placed above the fire extinguisher the fire extinguisher

indicating clearly and indicating clearly and briefly which type of briefly which type of

fire it can putfire it can put..

Zoroastrian Sacred Zoroastrian Sacred FlameFlame

Fire is worshipped in a Fire is worshipped in a number of religions. In number of religions. In

Zoroastrianism, the Zoroastrianism, the tending of the sacred tending of the sacred

flame is one of the flame is one of the central practices of the central practices of the faith. It is claimed by faith. It is claimed by

Zoroastrian elders that Zoroastrian elders that this sacred flame has this sacred flame has

been burning been burning continually since AD continually since AD 470. In 1940 it was 470. In 1940 it was

moved from its original moved from its original location in order to location in order to

place it behind glass for place it behind glass for protection.protection.

Fire fightersFire fighters

A team of fire fighters A team of fire fighters battles a fire at a battles a fire at a

London plant. London plant. Protective suits and Protective suits and helmets shield them helmets shield them

from intense heat and from intense heat and poisonous gases, but poisonous gases, but

their jobs are still their jobs are still rigorous and often rigorous and often

dangerous. At a fire, a dangerous. At a fire, a team performs team performs

necessary rescue necessary rescue operations, protects operations, protects nearby areas, and nearby areas, and

oversees salvage work, oversees salvage work, as well as containing as well as containing and extinguishing the and extinguishing the

blaze.blaze.

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