Class 4 EVS notebook work CH 14

CH-14

POLLUTION

KEY WORDS

pollution	garbage	decay	decibels
poisonous	chimneys	decompose	loudspeakers
smoke	residential	biodegradable	generators
emitted	dumping	typhoid	factories
carpools	chemicals	diarrhoea	deaf

Define the terms

1.    Pollution: Pollution is the presence or introduction into the environment of a substance or thing that has harmful or poisonous effects.

Q and A

Q-1  How is noise pollution caused?

A-1 Noise pollution is caused by:

       1. Horns of vehicles.

       2. Buzzers and hooters of factories.

       3. Noises of people in the markets.

       4. High volumes of TV and radio sets.

       5. Jugging sound of scooters and generators.

       6. Blaring of loudspeakers.

Q-2  What are the effects of air pollution?

Ans-2 Air pollution causes

       1.    Irritation in the throat, nose, lungs and eyes.

       2.    It causes breathing problems.

       3.    Respiratory and heart problems.

       4.    Global warming

   Q-3 List the ways by which we can prevent water pollution.                  

    Ans-3 Some ways to prevent water pollution are as follows:

          1. Avoid washing clothes and utensils in water bodies.

2. Dirty water from factory should not be released in water bodies.

3. Do not pour oil or grease and stop dumping garbage Like plastic in water.

    Q-4  Differentiate between biodegradable waste and non-biodegradable waste.

Biodegradable waste	Non-biodegradable waste
Things such as fruit and vegetable peels, paper get decayed easily and get mixed with the soil are known as biodegradable waste.	Things such as plastic, metal, glass and rubber do not decompose and remain in the soil for longer period of time, thus polluting land are known as non biodegradable waste

       

                              

  Extra Questions

Q-1.What causes air pollution?

A-1 Air pollution is caused due to smoke emitted from motor vehicles, cigarettes or factories.

Q-2.How can we prevent land pollution?

A-2 We can prevent land pollution by using biodegradable materials.

Q-3. How does noise pollution affect humans?

A-3 Noise pollution affects human nerves and can make a person, particularly a newborn deaf or dumb.

Q- 4. Name any two activities that cause water pollution.

    1.    Releasing dirty water from factories into water bodies.

    2.    Urinating and defeceating near water bodies.