Class 8 Science Pollution of Air and Water Extra Question Answer

Answer the following questions

 

Which gases are responsible for the greenhouse effect.

The main gases responsible for the greenhouse effect are carbon dioxide, methane, nitrous oxide, and water vapor.

 

What is the importance of the ozone layer?

The ozone layer is a layer of gas high in the atmosphere that prevents ultraviolet rays from reaching the earth, which is responsible for a variety of health problems and diseases such as skin cancer, respiratory diseases, and immune system problems.

 

Difference between Air and Water Pollution?

Any unwanted change in the physical, chemical, or biological properties of air.

Water pollution is the presence of unwanted substances in water that make it harmful to both living and non-living organisms.

 

Difference between Global Warming & Acid rain?

The term “global warming” refers to the unnatural increase in the Earth’s surface temperature.

Acid rain occurs when air pollutants such as Sulphur and nitrogen oxides react with oxygen and water vapor to form sulphuric and nitric acid, which mix and fall as acid rain.

 

Which gases are responsible for acid rain?

Nitrogen oxides and Sulphur oxides

Define the terms

Air Pollution: – 

Air pollution occurs when unwanted substances contaminate the air, causing harm to both living and non-living things. Air pollutants are substances that contaminate the air. Air pollutants are produced by factories, power plants, automobile exhausts, and the combustion of firewood and dung cakes. Air pollution is the root cause of many respiratory problems.

 

Carbon Monoxide: –

Carbon monoxide is produced as a byproduct of incomplete combustion of fuels such as gasoline and diesel. It’s a lethal gas. It reduces the blood’s oxygen-carrying capacity.

 

Smog: –

The presence of a fog-like layer in the atmosphere, particularly during the winter. This is smog, which is a combination of smoke and fog. In children, smog causes breathing problems such as asthma, coughing, and wheezing.

 

CFC: –

Refrigerators, air conditioners, and aerosol sprays contain chlorofluorocarbons (CFCs). CFCs deplete the atmosphere’s ozone layer.