Pollution
ICSE · Class 10 · Biology
Flashcards for Pollution — ICSE Class 10 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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See them allWhat is environmental pollution?
Answer
Environmental pollution is a large change in the quality of the environment that affects the life of plants and animals adversely. It is a deterioration in the environment caused by undesirable substa…
State the formal definition of pollution given by the Environmental Pollution Panel of the United States Science Advisory Committee (1965).
Answer
Pollution is "the unfavourable alteration of our surroundings wholly or largely as a byproduct of man's action through direct or indirect effect of changes in energy patterns, radiation levels of chem…
State the formal definition of pollution given by the National Research Council Committee on Pollution (1966).
Answer
Pollution is "an undesirable change in the physical, chemical or biological characteristics of our air, land and water that may harmfully affect human life." This definition links pollution directly w…
Who is the chief polluter of the environment?
Answer
Man is the chief polluter of the environment. Human activities such as industrialisation, urbanisation, transport, and excessive use of resources have greatly increased pollution.
What are pollutants? Give examples.
Answer
Pollutants are substances whose addition to the environment causes pollution. They may be particulate or gaseous. Examples include carbon soot, smoke, sulphur dioxide, carbon monoxide, detergents, lea…
What is the difference between biodegradable and non-biodegradable pollutants?
Answer
Biodegradable pollutants can be decomposed into harmless substances by microbes, such as dead and decaying remains of plants and animals, excreta, waste papers, and domestic refuse. Non-biodegradable …
What are primary pollutants?
Answer
Primary pollutants are pollutants released directly from the source. Examples include carbon dioxide, carbon monoxide, sulphur dioxide, hydrogen sulphide, and particulate matter such as dust, soot, po…
What are secondary pollutants? Give one example.
Answer
Secondary pollutants are produced by reactions among primary pollutants. A major example is PAN, or peroxyacetyl nitrate, which is formed when nitrogen oxide, oxygen, and hydrocarbons react in sunligh…
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