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Class 4 Science Pollution Que and Ans

Last updated on July 20th, 2023 at 09:34 pm

Class 4 Pollution Que and Ans

Class 4 Pollution Que and Ans for CBSE / NCERT / ICSE Board students.

Answer the following questions in Short:

What is pollution?

Ans: Pollution is the unwanted change of air, water or soil that degrades the quality of the environment.

 

Define pollutants.

Ans: Pollutants are substances that pollute air, water, and land.

 

How many types of pollutions are there?

Ans: There are mainly  4 types of pollution

  • Land pollution
  • Soil pollution
  • Air pollution
  • Sound pollution

 

What is land pollution?

Ans: Land pollution refers to the mixing of harmful substances in soil.

 

Define soil erosion.

Ans: Soil erosion occurs when water from the rain or wind washes away the top soil.

 

What is water pollution?

Ans: Water pollution is caused by household, industrial, and agricultural wastes.

 

What is afforestation?

Ans: Afforestation refers to the planting of trees in areas that are barren or have been deforested.

 

What is biodegradable waste?

Ans: Wastes that decompose easily are referred to as biodegradable waste.

 

Name two non-biodegradable waste.

Ans: Plastic and rubber are non-biodegradable wastes.

 

Define environment.

Ans: All living things and non-living things that exist naturally on earth make up the environment.

 

Multiple Choice Questions

Rubber is a ………… waste.
……………. pollution can occur as a result of chemicals flowing in rivers.
The release of harmful chemicals into rivers or oceans contributes ……………pollution
When harmful substances are mixed with the soil/air, it causes destruction of earth’s land surfaces. This is known as ……….. pollution
Which of the following means planting large numbers of trees?
Wastes like plastic, polythene, rubber, and glass decompose or rot.
……………. pollution occurs when chemicals, gases, or particles enter the atmosphere, making it unfit for breathing.
Wastes that are not biodegradable can be easily decomposed.
A fruit peel is a ______________ waste.
Infertility of soil can be caused by ……………. Pollution.
Among the three R’s of waste management, which one is not one?
………………. trees in large numbers is known as afforestation.
Trees stabilize the soil and prevent soil erosion.
Forests are being destroyed to build cities, towns, and factories
When trees are cut down in large numbers, it is called ………..
Food waste, paper, and wood can be decomposed or rotted easily.
MCQ on Pollution for Class 4
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