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WorksheetsEnvironmental Issues- Quiz 1
Total questions: 15
Worksheet time: 6mins
The phenomenon by which certain pollutants (e.g. DDT) accumulate in body tissue in increasing concentration is called
Biological magnification
Biological reduction
Bio-precipitation
Bio-degradation
Minamata disease is caused by contamination of
Hg
Pb
Cd
As
Which is a non-degradable pollutant?
Smoke
Polythene
Copper scraps
Iron scraps
Which of the following is a natural pollutant?
Smog
Volcanic gases
Strong wind
Gale
As the organic waste input in a water body increases,
BOD increases
BOD decreases
BOD may increase or decrease
Cannot be said with surety
Pick out the correct choice from the following
As BOD increases, DO increases
As BOD increases, DO decreases
It depends on the water body and the surrounding environment
No such relation exists between BOD & DO
When and where the Ozone hole was discovered?
1985, Antarctica
1985, Arctic
1987, Arctic
1987, Antarctica
Thickness of ozone is measured in
Decibel
Dozen
Dobson
Meter
Which of the following is correct about “El Nino effect”?
temperature rise leads to odd climatic changes
cutting down the use of fossil fuels.
planting trees
slowing down the growth of human population.
According to size of air pollutants, range and types of chemical the below shown device is best used to control which of the following pollutants?
large particulates
charged particulate matter
dissolved gases
fine particles
When domestic sewage mixes with river water –
small animals like rats will die after drinking river water
the increased microbial activity releases micronutrients such as iron
the increased microbial activity uses up dissolved oxygen
the river water is still suitable for drinking as impurities are only about 0.1%
Biological oxygen demand of ________ is the least.
sewage
sea water
pure water
polluted water
We and our surroundings together are called...
environment
atmosphere
lithosphere
hydrosphere
Which method is used to control pollutants of particulate nature ?
Combustion
Absorption
Electrostatic precipitators
Oxidation pond
Which of the following figures shows correct relative contribution of greenhouse gases to global warming?
