Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 16 Water Conservation Textbook Exercise Questions and Answers.
PSEB Solutions for Class 4 EVS Chapter 16 Water Conservation
EVS Guide for Class 4 PSEB Water Conservation Textbook Questions and Answers
Textbook Page No. 116
Question 1.
What was the main source of irrigation in old times?
Answer:
Rain water.
Question 2.
How is ground water affected by the cultivation of paddy?
Answer:
Ground water is getting depleated due to cultivation of paddy.
Question 3.
What is the main source of irrigation in Punjab, now-a-days?
Answer:
Tubewells.
Question 4.
Write any one way to conserve water at home.
Answer:
We can wash the utensils with the waste water of RO filter.
Activity-2.
Enlist the public taps in your village and note how many of them are not turned off after use.
Answer:
Do it yourself.
Textbook Page No. 119-120
Question 5.
Answer the following questions in brief:
(a) What measures should be adopted to minimise the use of water in agriculture? –
Answer:
We should adopt the modern techniques of irrigation e.g. drip system, fountain system of irrigation.
(b) What is the effect of submersible pumps on the use of water in houses?
Answer:
Ground water is getting depleated, we are not using water wisely. We waste a lot of water.
(c) Why can we not use water of ocean?
Answer:
Many Unwanted salts are dissolved in sea water, it is not fit for direct consumption.
(d) What is the proper way of using water while brushing/bathing?
Answer:
We should use Bucket and mug and should not let the tap turned on.
Question 6.
Tick (✓) the right option :
(a) Without which thing we can not survive?
Chocolate
Water
Mobile
Answer:
Water.
(b) What percentage of Earth’s surface is under water?
65%
75%
70%
Answer:
70%.
(c) Underground water is drawn out
with
Tubewell
Pond 1
Canals
Answer:
Tubewell.
(d) How does the ocean water taste?
Sweet
Bitter
Salty
Answer:
Salty.
(e) Which crop needs more water?
Wheat
Paddy
Millet
Answer:
Paddy.
Question 7.
Fill in the blanks :
(Water, down, less, save, submersible)
(a) We should water.
(b) There is a little on earth for use.
(c) People deploy pumps in house.
(d) The crops like gram, millet and guwar need water.
(e) The level of underground water is going
Answer:
(a) save,
(b) water,
(c) submersible,
(d) less,
(e) down.
Question 8.
Tick (✓) the correct and cross (✗) the wrong sentences :
(a) Conservation of water is essential.
(b) Submersible pumps are deployed in houses to save water.
(c) The level of underground water is going down rapidly.
(d) We can use the salty water of ocean in houses.
(e) Water is a renewable resource.
Answer:
(a) ✓
(b) ✗
(c) ✓
(d) ✗
(e) ✓