DAV Class 4 Science Chapter 9 Question Answer Safe Handling and Storage of Water are prepared by Science subject experts. With the help of these solutions for Class 4 Science My Living World Book, you can easily grasp basic concepts better and faster.
Here at SOLUTIONGYAN, chapter 9 Safe Handling and Storage of Water of Science book exercises provided at the end of the chapter will be a useful resource for DAV Class 4 students.
Here, we provide complete solutions of DAV Class 4 Science Chapter 9 Safe Handling and Storage of Water of My Living World Textbook. These exercise of science chapter 9 contains 5 questions and the answers to them are provided in the DAV Class 4 Science Chapter 9 Question Answer Safe Handling and Storage of Water.
DAV Class 4 Science Chapter 9 Safe Handling and Storage of Water Solutions
DAV Class 4 Science Chapter 9 Safe Handling and Storage of Water Solutions is given below. Here DAV Class 4 Science chapter 9 question answer is provided with detailed explanation.
Highlights
- Fill in the blanks
- Write True or False
- Tick the correct option
- Answer the following questions in brief
- Answer the following questions
DAV Class 4 students are more likely to score good marks in Science exam if they practise DAV Class 4 Science Chapter 9 Question Answer Safe Handling and Storage of Water regularly.
DAV Class 4 Science Chapter 9 Question Answer
A. Fill in the blanks.
1. Water, which is fit for drinking, is called ___________.
2. Ground water is not fit for drinking because it contains ___________ and ___________.
3. ___________ removes dust from water.
4. ___________ and ___________ kill germs present in water.
5. Water should always be stored in ___________ and ___________ utensils.
Answer: (1) Potable water (2) dirt, germs (3) Filtration (4) Boiling, chlorination (5) clean, covered
B. Write True or False for the following statements.
1. We should always store drinking water in covered clean containers.
2. We can drink water that has been stored for many days.
3. We need to purify water before drinking it.
4. We can allow water to stagnate around our house.
5. We should use a ladle to take out water from a container.
Answer: (1) True (2) False (3) True (4) False (5) True
C. Tick the correct option.
1. Germs, present in water, may be killed by-
Answer: Chlorination
2. By drinking unclean water, one may get a disease like-
Answer: Jaundice
3. Dust and other suspended particles present in unclean water can be removed by-
Answer: Filtration
4. Our body requires, and uses, water for-
Answer: Digestion of food
D. Answer the following questions in brief.
1. State the meaning of the term ‘potable water’.
Answer: Water which is fit for drinking is called potable water.
2. Name any two diseases that can be caused by drinking unclean water.
Answer: Two diseases that can be caused by drinking unclean water are:
- Diarrhea
- Cholera
3. Name the diseases which are spread by mosquitoes.
Answer: Malaria and Dengue
4. How does boiling help in making water safer for drinking?
Answer: Boiling kills the germs present in water.
5. Name two methods of purification of water.
Answer: Two methods of purification of water are:
- Boiling
- Chlorination
6. State any two ways of safe handling of drinking water.
Answer: Two ways of safe handling of drinking water are:
- Water should always be stored in clean and covered containers.
- We should never dip our hands in water which is stored for drinking purpose.
E. Answer the following questions.
1. Why should water be purified before drinking?
Answer: Water should be purified before drinking because it may contain germs and dust particles.
2. What is chlorination? How does it purify water?
Answer: Adding a correct small amount of chlorine into the water is called chlorination. This kills germs and makes it fit for drinking.
3. Why is the traditional method of filtration not completely sufficient for making water fit for drinking?
Answer: The traditional method of filtration not completely sufficient for making water fit for drinking because it does not kill germs present in water.
4. Why should we not allow water to stagnate around our houses?
Answer: We should not allow water to stagnate around our houses because it is the breeding place for mosquitoes.
5. State two ways that can be used to prevent breeding of mosquitoes in room coolers.
Answer: Two ways that can be used to prevent breeding of mosquitoes in room coolers are:
- We should change water in room cooler after 3 to 4 days.
- When water cannot be changed then two spoons of kerosene should be put in it.
Very good