ICSE-IX-Geography
16: Pollution
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- #Section : IShort Answer Questions
- Qstn #1What is environmental pollution ?Ans : Environmental pollution refers to any unfavourable alteration of our surroundings, wholly or largely as a by product of man’s actions. These changes may affect man and other organisms.
- Qstn #2Give the definition of a pollutant.Ans : A pollutant is a product released into the biosphere disturbing the normal functioning of ecosystem due to its adverse effect on plants, animals and man.
- Qstn #3Give the difference between natural and man-made pollutants.Ans : Natural pollution takes place by increasing the quantity of Carbon dioxide and Nitrogen oxide in the atmosphere but man made pollution is done by using pesticides, chemical fertilizers.
- Qstn #4What is air pollution ? Give a source of air pollution.Ans : Air pollution is the excessive concentration of foreign matter in the air which adversely affects the well-being of human beings, animals, plants and their environment. Air pollution is caused by addition of chemicals, carbon monoxide, sulphur dioxide, hydrogen sulphide by various factories, industrial plants.
- Qstn #5Define water pollution.Ans : Water pollution is caused by contamination of water by alteration in physical, chemical, biological characteristics of water making it unsuitable for designated use in its natural state.
- Qstn #6What is soil pollution ?Ans : Soil pollution is defined as the change in physical, chemical and biological conditions of the soil through man’s intervention resulting in degradation in quality and productivity of soil.
- Qstn #7Why should we avoid soil pollution.Ans : Soil is the basic need of agriculture. If the soil is polluted, the crops will be harmful for health and quality.
- Qstn #8What is radioactive pollution ?Ans : Radioactive pollution is done by cosmic radiation from space, terrestrial radiation from radio-isotopes from earth’s crust, nuclear fuels in atomic plants, atomic bombs etc.
- Qstn #9What is noise pollution ? What harm does noise pollution do to human beings ?Ans : Noise pollution is done by extreme noise done by industrial sector, transport, loud speakers etc., which adversely affect human health causing severe headache, migraine, mental disbalance, nervous breakdown, heart diseases.
- Qstn #10Give the difference between biodegradable and non- biodegradable pollutants.Ans :
Biodegradable pollutants Non-biodegradable pollutants Biodegradable pollutants are degraded by microbial actions. Non-biodegradable pollutants are not degraded. Examples: sewage, garbage etc. Examples: glass, plastics etc.
- #11-iBiodegradable and Non-biodegradable PollutantsAns : Difference between
Biodegradable pollutants Non-biodegradable pollutants These may be degraded 'after sometime by biological or microbial action'. These are not degraded by any biological or microbial action. Examples: sewage, domestic garbage, vegetable peels etc. Examples: glass, plastics, radioactive materials, pesticides etc.
- #11-iiQuantitative Pollutants and Qualitative Pollutants.Ans : Difference between
Quantitative pollutants Qualitative pollutants The excess of CO2, Nitrogen oxides etc. pollute the atmosphere. Use of pesticides, chemical fertilizers pollute the composition of atmosphere. These create unhealthy atmosphere due to the scarcity of oxygen. These results in various diseases like skin cancer, asthma etc.