Skip to main content

8th Class Science Notes- Pollution of Air and Water

8th Class Science Notes- Pollution of Air and Water

Air pollution is basically the occurrence of the chemical in the air in quantities which are harmful to human health and the environment.
The common air pollutants and their main sources:-
  • Particulate Matter: – It is made up of tiny particles suspended in air. Major particulate matter sources are volcanic eruption, dust storm, burning of fossil fuel in thermal plants and forest fire. They are also present in exhaust fumes of automobiles and power plants as soot, fly ash and lead particles.
  • Chlorofluorocarbons (CFCs) – They are commonly used as coolants in refrigerators, air conditioners and as propellants in aerosol spray cans. They are also used in home insulation, plastic foam, and throwaway metallic cans.
  • Burning of fossil fuels- They are coal and petroleum in thermal power plants and automobile releases oxides of sulphur and nitrogen into the air.
  • Burning of carbon– Carbon-rich fuels such as firewood, coal, and petroleum releases carbon dioxide and carbon monoxide into the atmosphere.

Watch interesting videos and learn causes of air pollution with CBSE Class 8th Science.  
For 8th Class NCERT solutions please visit our website. www.takshilalearning.com.
Labels:

Comments

Post a Comment

Thank you we will contact ASAP.

Popular posts from this blog

Why is Hindi Day celebrated on 14 September?

Why is Hindi Day celebrated on 14 September? After independence, the Government of India set a goal to give an ideal form to the mother tongue of the country and set a target for grammar and orthography using the Devanagari script to bring standardization in writing. Subsequently, on September 14, 1949, the Constituent Assembly decided by a vote that Hindi would be the official language of India. To propagate the importance of this decision and to spread Hindi in every region, India is celebrating Hindi Day every year from 1953 to 14 September, at the request of Rashtrabhasha Prachar Samiti, Wardha. Apart from this, 14 September is also the birthday of Rajendra Singh, who worked tirelessly to make Hindi the official language of India. Hindi Day is observed every year on 14 September to mark the importance of the Hindi language in the country. The Hindi language is one of the oldest languages, which derives most of its academic vocabulary from the Sanskrit language written in the Deva
Post a Comment
Read more

Magnetic and non-magnetic material Class 6 Science

Magnetic and non-magnetic material  Class 6 Science A magnet is a substance that is drawn to certain magnetic materials like iron, cobalt, and nickel. Magnets have the ability to draw iron to them. Natural magnets are rocks that naturally draw iron. Non-magnetic materials include things like wood, rubber, coins, feathers, leather, etc. that are not drawn to iron. Magnet characteristics It pulls magnetic materials, such as iron. The magnet's two ends are referred to as its poles. The magnet's diametrically opposed poles are drawn together. Heating, hammering, or dropping causes it to lose its characteristics. On the basis of properties types of Magnets Temporary magnets are those magnets that are magnetic for only a little duration. Typically, iron, cobalt, or nickel are used to make them. When they are close to the powerful magnet, they act like a magnet. When they are yanked away from the powerful magnet, they stop being magnetic. Permanent magnets are magnets that have magne
Post a Comment
Read more