Maharashtra Board Class 8 Science Solution Chapter 8 – Pollution
Balbharati Maharashtra Board Class 8 Science Solution Chapter 8: Pollution. Marathi or English Medium Students of Class 8 get here Pollution full Exercise Solution.
| Std | Maharashtra Class 8 |
| Subject | General Science Solution |
| Chapter | Pollution |
Ex – 8
(1)
(a) Air pollution
(b) Water pollution
(c) Air Pollution
(d) Water pollution
(e) Air pollution
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(2) Nilesh is suffering by sound, Air & water pollution in following passage.
(3) Matching Solution:
| (1) Water containing cobalt | Paralysis |
| (2) Methane gas | Mental retardness |
| (3) Water containing lead | Skin cancer |
| (4) Sulphur dioxide | Irritation of eyes |
| (5) Nitrogen Dioxide | Inflamation of lungs |
(5)
(a) Pollution:-
The presence of harmful substances in the air, land & water which can have an adverse effect on living beings & on the environment is known as pollution. Due to pollution there are so many negative effects have been alone in the environment. Various types of pollutions are like air pollution, air pollution, and sound pollution
(b) Pollutant: –
A pollutant in a chemical o biological substance which pollute the environment. It is harmful chemical or waste material discharged into industrial process & poisonous gases from vehicle.
(c) Acid: –
Acid rain is a type of precipitation with acidic components. The sulphuric or nitric acid fall to the ground in wet or dry foams. This can include rain, snow, fog, hail or even dust that is acidic.
(d) Green house effect: –
The green house effect is a process that occurs when gases in Earth’s atmosphere trap the sun’s heat. This process makes Earth much warmer than it would be without an atmosphere. The greenhouse effect is one of the things that make Earth a comfortable place to live.
(e) There have many types pollutions like as sound pollution, Noise pollution, Air pollution, water pollution.
(f) Invisible Pollution: –
(i) Nitrogen dioxide
(ii) Carbon dioxide
(iii) Sulphur dioxide
(7)
| Natural | Man made |
| (i) Dust | (i) Sewage |
| (ii) algae | (ii) Chemical fertilisers |
| (iii) Pollen grain | (iii) West of animals & birds |
| (iv) Vehicle smoke | |
| (v) Pesticides |
(8)
(a) *Water pollution: – Sewage, sanitary west
*Air pollution: – Vehicles smoke, fuel
*Soil Pollution: – Pesticides, Pollen gases
(b) Vehicles discharge chemical smoke & make air pollution
Causing least pollution vehicles are cycle, Rickshaw, Toto.
(c) Due to algae bacteria, viruses, parasites etc natural water pollution is occurred.
(d) The privative measure of air pollutions are following: –
(i) Tree Plantation
(ii) Reduce to use motor vehicles.
(iii) Stop to use plastic materials.
(iv) Recycling of polluted product.
(f) Solgans: –
(i) Plant trees, save lives.
(ii) More tree, more live
(e) The greenhouse effect is a natural process traps heat in the atmosphere global warming tends to be when addition green house gases are released into the atmosphere and this cause a warming event.