Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 17 Water Pollution Textbook Exercise Questions and Answers.
PSEB Solutions for Class 4 EVS Chapter 17 Water Pollution
EVS Guide for Class 4 PSEB Water Pollution Textbook Questions and Answers
Textbook Page No. 122
Question 1.
List the activities carried on by people near water sources that pollute the ‘ water?
Answer:
Bathing, washing clothes, defacations cattle bathing etc.
Activity-1.
Try to Find out from Doctor or Staff of nearby Primary Health Centre of your village/city, which diseases are caused by drinking contaminated water and also find the number of patients suffering from these diseases. Note this information in your notebooks and discuss with your friends.
Answer:
Do it yourself.
Question 2.
Which diseases are spread by mosquitoes?
Answer:
Malaria, Dengue.
Activity-2.
Prepare ORS solution with the help of your teacher.
Answer:
Boil a glass of water and let it cool. Add one spoon full of sugar and a pinch of salt in it. ORS is ready.
Textbook Page No. 125-126
Question 3.
Fill in the blanks :
(Diarrhoea, cleans, dirty, Kali Bein, urbanisation)
(a) The water gets ………………… after domestic use.
(b) Due to ………………… there is increase in water utilisation.
(c) Water Treatment Plant ………………… the dirty water.
(d) ………………… can be caused by drinking contaminated water.
(e) ………………… is associated with Sri Guru Nanak Dev Ji.
Answer:
(a) dirty,
(b) urbanisation,
(c) cleans,
(d) Diarrhoea,
(e) Kali Bein.
Question 4.
Tick (✓) the right and cross (✗) the wrong sentences :
(a) We are not responsible for water pollution.
(b) There should be a ban on the use of plastic bags.
(c) Nothing happens due to drinking contaminated water.
(d) Water is filtered by R.O. filter.
Answer:
(a) ✗
(b) ✓
(c) ✗
(d) ✓
Question 5.
Tick (✓) the right answer :
(a) Which one of the following is responsible for water pollution?
Dust
Polyethene
Noise
Answer:
Polyethene
(b) What gets polluted by spraying of insectiddes?
Air
Water
Both
Answer:
Both.
(c) Which water body has been cleaned by Sant Balveer Singh Seechewal?
Ganga River
Kali Bein
Sutlej River
Answer:
Kali Bein.
(d) Which disease can be caused by drinking contaminated water? Cholera Malaria Dengue
Answer:
Cholera.
Question 6.
Write the answers of the following in brief:
(a) Write any two reasons of water pollution.
Answer:
- Use of insecticides in the fields.
Use of fertilizers in the fields. - Washing of clothes near the water sources.
(b) Name the diseases caused by drinking polluted water.
Answer:
Cholera, dysentery, diarrhoea, teeth problem, skin problem etc.
(c) Write two methods of cleaning water.
Answer:
- R.O. Filter system
- Water treatment plant.
(d) What is added to water to prepare ORS?
Answer:
Sugar and, Salt.
(e) Write two methods of stopping water pollution.
Answer:
- Farmers should use less insecticides.
- Polytbene should be completely banned.
Question 7.
Mind Mapping:
Answer:
