Air, Water and Soil Pollution - 8th Std Science
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Question 1 |
Human beings damage healthy environment by __________
uncontrolled activities | |
controlled activities |
Question 2 |
_______ present in the earth’s crust are the sources of radioacticity in the atmosphere.
Non Radioactive minerals | |
Radioactive minerals |
Question 3 |
Most of the environmental problems are related to the increasing _______
population | |
Community | |
Pollution |
Question 4 |
________ leads to global warming.
Nitrogen | |
Carbon dioxide | |
Hydrogen |
Question 5 |
Sulphur burns with oxygen to give __________
Sulphur oxide | |
Sulphur dioxide |
Question 6 |
The increase in the global mean temperature due to green house gases is called __________
Climate Change | |
global warming |
Question 7 |
Holes in the Ozone layer allow the harmful ______rays to reach the earth.
U-V | |
X-Y |
Question 8 |
_________ reduces the amount of pure fresh water.
Water pollution | |
Acid Rain |
Question 9 |
Damage to soil results in ________
weathering | |
corrosion | |
erosion |
Question 10 |
__________ systems carry waste from homes, offices and industry into water.
sewerage | |
Sewage |
Question 11 |
Most heated water comes from industries and power plants that use water for their _________
dry air coolers | |
cooling towers | |
Heating towers |
Question 12 |
________ the treated water for gardening or cooling purpose.
Reuse | |
Recycle | |
Reduce |
Question 13 |
________ of water is a process of removing pollutants before it enters a water body.
Sanitizing | |
Cleaning | |
Whitening |
Question 14 |
The treated water has a very low level of _________
Organic material | |
Minerals | |
Calcium |
Question 15 |
Plastics cause ___________ pollution
Water | |
Air | |
land |
Question 16 |
______ is polluted by garbage.
Air | |
Water | |
Land |
Question 17 |
_________ destroy the insects.
Pesiticides | |
Fungi | |
insecticides |
Question 18 |
________ hold soil in place.
River and Oceans | |
Trees and Plants |
Question 19 |
Real estate development can cause _______
Water Pollution | |
Air pollution | |
land pollution |
Question 20 |
__________ is biodegradable plastic
poly(3-hydroxybutyrate-co-3-hydroxyvalerate) | |
Poly Hydroxy Butyrate |
Question 21 |
The ______ and ______ micro organism are responsible for degradation.
Eumycetes, Schizomycetes | |
Insects, Bacterias |
Question 22 |
The world’s worst industrial disaster occurred in Bhopal was caused by the leakage of ________ gas.
methyl iso thio cyanate | |
Methyl Iso Cyanate (MIC) |
Question 23 |
Chlorofluorocarbon causes _________
Skin cancer | |
Ulcer | |
Throat Cancer |
Question 24 |
_________ poisoning causes minamata disease.
Mercury | |
Oil | |
Water |
Question 25 |
The three points we should remember and follow in our day today life are ________
Hope,Tolerance, Unity | |
Reduce, Recycle and Reuse | |
Respect, Love, Trust |
Question 26 |
Match the following.
- Burning of sulphur a. land pollution
- Combustion of fuels b. fertilizer
- Waste from farms c. Carbon monoxide
- Withering of soil d. Sulphur dioxide
- careless farming methods e. erosion
4 1 2 3 5 | |
5 3 2 1 4 | |
3 4 1 2 5 | |
1 5 2 3 4 |
Question 27 |
Match the following.
- homo polymer a. water body
- stream b. high uality fuel
- Compresses Natural Gas c. acid rain
- Nitrogen oxides d. pesticides
- DDT e. biodegradable plastic
4 5 1 3 2 | |
2 3 4 5 1 | |
1 3 2 5 4 | |
3 2 1 4 5 |
Question 28 |
- III. Choose the correct answer
Pathogenic | |
Anthropogenic |
Question 29 |
The percentage of oxygen in air is
78% | |
20.9% |
Question 30 |
Carboxy haemoglobin is formed due to the air pollutant.
Nitrogen dioxide | |
Sulphur dioxide |
Question 31 |
Which of the following gas is responsible for global warming.
CO | |
CO_2 |
Question 32 |
The gas present in the stratosphere is
CO | |
CO_2 |
Question 33 |
Land is mainly polluted by
Sewage Wastes | |
Fertilizers |
Question 34 |
The trade name of fully biodegradable plastic material naturally produced by micro organism is
Alcaligens | |
Eurogens |
Question 35 |
Industrial emission / forest fire is a man made source of air pollution.
CO | |
CO_2 |
Question 36 |
Nitrogen oxides / carbon dioxide case acid rain.
Nitrogen Oxides | |
carbon dioxide |
Question 37 |
Sulphur dioxide causes lung cancer / global warming.
global warming | |
lung cancer |
Question 38 |
Oxides of Nitrogen dissolve in atmospheric water vapour forming nitric acid/ nitric oxide.
nitric acid | |
nitric oxide |
Question 39 |
Ozone layer / acid rain causes corrosion of many buildings, bridges etc.
Ozone layer | |
acid rain |
Question 40 |
Holes in the ozone layer allow the harmful X-Rays/U-V Rays to reach the earth.
X-Rays | |
U-V rays |
Question 41 |
The pollutants that affect water come mainly from pond/ industries.
pond | |
industries |
Question 42 |
Addition of hot water to body of water is called water pollution/ thermal pollution
water pollution | |
Thermal pollution |
Question 43 |
The process of waste water treatment is known as Sewage treatment/ Sewage system.
Sewage treatment | |
Sewage syste |
Question 44 |
The use of excessive amount of fertilizer may decrease the pollution/ productivity of the soil.
pollution | |
productivity |
Question 45 |
Erosion/ Damage is the withering away of soil.
Erosion | |
Damage |
Question 46 |
Fertilizers make crops grow more quickly, but can also clean / poison rivers and streams.
clean | |
poison |
Question 47 |
The release of carbon dioxide/ Chlorofluorocarbon from refrigerators has caused a breakdown in the ozone layer.
carbon dioxide | |
Chlorofluorocarbon |
Question 48 |
To save our earth from water crisis, we have to plant/cut down trees.
plant | |
cut down |
Question 49 |
Planting more trees will increase the oxygen/ carbon dioxide content in the air.
oxygen | |
Carbon dioxide |
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There are 49 questions to complete.
