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Air Flashcards

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1
Q

what is inert gas?

A

inert gas is chemically stable and non reactive.

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2
Q

State the importance of Oxygen.

A

Respiration
Combustion of rocket engine a high altitude
Welding and steel cutting
Preparation of various compound

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3
Q

State the importance of CO2

A

Photosynthesis
Production of carbonated drinks
Fire extinguisher
Carbon cycle

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4
Q

State the importance of Nitrogen

A

Production of nitric acid and ammonia
Nitrogen cycle
Liquid nitrogen as cooling agent

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5
Q

What does Photosynthesis do in the CO2 cycle?

A

Green plants use CO2 and sunlight to create their own food which makes carbon part of the plant.

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5
Q

State the importance of Inert Gas

A

Helium is used to fill hot air balloons
Neon gas is used in advertising lights
Argon gas is used in light bulbs

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6
Q

What does Combustion do in the CO2 cycle?

A

When humans burn fossil fuels like coal and oil,most of the carbon quickly enters the atmosphere as CO2

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7
Q

What does Respiration do in the CO2 cycle?

A

most of the carbon is exhaled as CO2 during respiration

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8
Q

What does Decomposition do in the CO2 cycle?

A

Whne animals or plants die,they decopose by microbes like bacteria and fungi which releases CO2 into the air.

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9
Q

What is the use of O2 cycle?

A

It is required for processes like rusting,decoposition,combustion and respiration which is produced in photosynthesis

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10
Q

What is the use of O2 cycle? (second example)

A

Co2 released from these processes is used in photosynthesis

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11
Q

Ways to reduce problems of interferences to the oxygen and carbon cycle

A

Prohibit illegal loging
Avoid using excessive pesticides
Reforestation
Prevent excessive release of smoke from vehicles
Do not burn forests

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12
Q

Interferences in CO2 and O2 cycle.

A

-global warmig
-illegal logging
-deforestration
-burning fossil fuels
-increase of CO2
-green lungs

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13
Q

What is combustion?

A

it is a chemical reaction between a substance and oxygen to produce CO2,heat and light

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14
Q

Three conditions of combustion

A

-Heat
-Fuel
-Oxygen

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15
Q

What is the use of oxygen in combustion?

A

Enough oxygen to sustain combustion

16
Q

What is the use of fuel in combustion?

A

Fuels are combustion materials

17
Q

What is the use of heat in combustion?

A

Enough heat is used to raise materials to its ignition temperature

18
Q

Types of fire extinguisher for different sources of fire

A

Solid,Liquid,Gas and Metal

19
Q

Solid..

A

Example of material
-wood cloth,paper
Type of fire extinguisher
-dry powder,water

20
Q

Liquid

A

Example of material
-oil,varnish,paint
Type of fire extinguisher
-foam,CO2,dry powder

21
Q

Gas

A

Example of material
-Propane, acetylene
Type of fire extinguisher
-Foam, dry powder, carbon dioxide

22
Q

Metal

A

Example of material
-Potassium, sodiumm, magnesium
Type of fire extinguisher
-dry powder,dry sand

23
Q

What is starving

A

Removing of fuels or combustible materials

24
Q

What is smothering

A

Cutting off the supply of oxygen by covering the surface of fuel with fire blanket, wet sack

25
Q

What is cooling?

A

Cooling surface of burning materials by spraying water or a layer of carbon dioxide

26
Q

Safety measures to prevent the occurence of fire:

A

-Keep away flammable substances from fire
-Always be aware of your electrical appliances
-Do not plug in too many electrical appliances to a single electrical source
-Install fire alarm and smoke detector at home
-Do not throw away cigaratte butts when they are still burning
-Keep matches and lighters in a safe place

27
Q

What is air pollution?

A

Air pollution is a situation which involves the presence of any pollutants in the air

28
Q

Sources such as Open burning,Cigarettes,Forest fires

A

Can cause pollutants such as Dust, soot, smoke

29
Q

Sources such as Construction sites,Asbestos factories,Limestone quarries

A

Can cause pollutants such as Dust and soot

30
Q

Agriculture and plantation activities

A

Can cause pollutants such as Aerosol spray, chemical fertilisers

31
Q

Airconditioners,Refrigerators,Aerosol sprays,Electronic factories

A

Can cause pollutants such as Aerosol spray, chemical fertilisers

32
Q

Nuclear power plants

A

Can cause pollutants such as Radioactive materials

33
Q

Exhaust of vehicles,Factories

A

Can cause pollutants such as Smoke, soot, dust, carbon monoxide

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