What is air pollution? Or what is water pollution? What are the measures that we can take to stop the pollution? We can say that the substances making the water dirty are known as contaminants. Or the natural air gets polluted with smoke.
Meaning (Pollution):
When unwanted substances are present in the environment, they affect several aspects. For example:
Plants
Animals
Biological components
Physical components
Pollutants:
The source of pollution is any substance. The pollutants can be anywhere.
Liquid
Solid
Gaseous
Such pollutants occur when their concentration is more than natural abundance.
Types:
Air Pollution:
The presence of pollutants in the air causes air pollution.
Water Pollution:
Dirty material and other raw materials in water cause water pollution.
Sound Pollution:
When in a particular area, more rush of vehicles can cause sound pollution.
Soil Pollution:
Excessive use of fertilisers and pesticides in the soil causes soil pollution.
Some measures to prevent pollution:
Many measures can prevent all types of pollution. Some are below:
One must use the CNG.
Do the proper management of assets.
To increase the use of public transportation.
Use unleaded petrol.
Learning Videos for 8th Grade Science - Pollution of Air and Water
Pollution of Air and Water Sample Questions for Class 8
Question 1
The biome has trees that change color and shed their leaves, such as oak and maple. Temperatures vary greatly throughout the year. It is located in the Eastern United States.
A. rain forest
B. desert
C. boreal forest
D. deciduous forest
Question 2
Scientists are attempting to protect biodiversity by mating animals in zoos or on wildlife preserves using the method of
A. habitat fragmentation.
B. captive breeding.
C. habitat preservation.
Question 3
Symbiosis includes
A. mutualism.
B. commensalism.
C. parasitism.
D. all of the above
Question 4
My eyes are blue, my hair is red, I have freckles, and I inherited a gene that causes cancer. These features may be studied in the field of
A. astrology.
B. endocrinology.
C. bioinformatics.
D. genetics.
Question 5
Which of the following best describes carbon monoxide?