File Name: pollution of air and water class 8 notes .zip
Environmental pollution can be defined as undesirable changes that happen in the surrounding. These changes have negative and adverse effects on animals, plants, and other physical and biological components of the environment. Pollutants can either be present in gaseous, solid, or liquid form.
Download revision notes for Pollution of Air and Water class 8 Notes and score high in exams. These are the Pollution of Air and Water class 8 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter 18 in minutes. Revision notes in exam days is one of the best tips recommended by teachers during exam days. Pollution: An undesirable change in the physical, chemical or biological characteristics of air, water and land that may be harmful to human life and other animals, living conditions, industrial processes and cultural assets. Pollutants: The agents that pollute our environment are called pollutants. For eg.
Carbon dioxide, argon, methane, ozone and water vapour are present in very small quantities. It reduces the oxygen-carrying capacity of the blood. It causes respiratory problems, including permanent lung damage. Ozone layer protects us from ultraviolet rays of the sun. The acid drops come down with rain which is known as acid rain. This phenomenon is called marble cancer. A part of the reflected radiation is trapped by the atmosphere.
Register Now. Hey there! We receieved your request. Air is a combination of different gases that form the atmosphere of the Earth. This constituent of air may vary on other planets. However, some planets do not have air. Space contains no air.
Pollution of Air and Water. Which of the following is not a greenhouse gas? Which air pollutant reduces the oxygen-carrying capacity of the blood? Carbon monoxide reduces the oxygen-carrying capacity of the blood. What protects us from harmful ultraviolet rays of the sun?
Air is the most important element for any living thing to survive. We find air around the earth in the form of a blanket which is known as the atmosphere. This air is a mixture of various gases. When the air gets contaminated by unwanted substances which have a harmful effect on living and non-living things, it is known as air pollution.
The things which are responsible for contamination of air are called air pollutants. These pollutants may result from natural causes like smoke or dust from forest fires or volcanic eruptions and from man-made causes like burning of fuels, smoke from factories etc. Effects of Air Pollution: 1. Many problems related to respiratory system might be caused due to air pollution.
Air consists of a mixture of gases. Carbon dioxide, argon, methane, ozone, water vapour are also present in very small quantities. Air Pollutants: The substances which contaminate the Eiir Eire called air pollutants.
Polluted air or water contains substance that are harmful for human beings and environment as well.
Air is the most important element for any living thing to survive. We find air around the earth in the form of a blanket which is known as the atmosphere. This air is a mixture of various gases. When the air gets contaminated by unwanted substances which have a harmful effect on living and non-living things, it is known as air pollution. Water pollution can be defined as the addition of undesirable substances into the hydrosphere.
Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks. Covers the following topics:. Source of Water Pollution. Effect of Water Pollution. Prevention of Water Pollution. Air Pollution.
2. Water Pollution: The addition of undesirable and unwanted material in water which makes water harmful for biotic and abiotic components is called water.
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