Class 5 Basic Science - Chapter 02 Life-Giving Water - Questions and Answers


Study Notes for Class 5th Basic Science (English Medium) അദ്ധ്യായം 02 ജീവജലം | Text Books Solution Basic Science (English Medium) Chapter 02 Life-Giving Water

SCERT Solutions for STD V Basic Science Chapterwise
Life-Giving Water - Questions and Answers & Model Questions
1. What are the uses of water?
Answer:
• For drinking
• For agriculture
• For washing vessels
• For cooking food
• For cleaning
• For washing cloths
• For Industries
• For taking a bath

2. What is Solute?
Answer: A Substance that dissolves is called Solute.

3. What is Solvent?
Answer: In which the solute dissolves is called a solvent.

4. The gum which sticks to the knife while cutting a jack fruit is removed using kerosene. which property of kerosene is utilised here?
Answer: Kerosene acts as a solvent here. The gum is soluble in kerosene. so the gum can be easily removed from the knife.

5. What is a Solution?
Answer: The solution is that which is formed when a solute dissolves in a solvent.
Example: In sugarsolution sugar is the solute and water is the solvent.

6. Why water is called the universal solvent?
Answer: Water is an advent that dissolves a large number of substances. Hence water is called the universal solvent.

7. Pure water is colourless, odourless and tasteless. What are the other properties of water? Making use of the pictures and table given below, discuss the properties of water and record them in the science diary.


8. What can you see when the soda bottle is opened?
Answer: We can see bubbles of gas coming out from the bottle it is due to the dissolved carbon diode in soda water.

9. Complete the table writing separately the solute and solvent in each solution


10. Does jackfruit glue soluble in water?
Answer: No, it is insoluble in water but it is soluble in coconut oil and kerosene.

11. Does paint soluble in water?
Answer: No paint is insoluble in water it is soluble in kerosene.

12. Several objects float on water. Have you come across any instance in which we make use of the property?
Answer:
(a) Carrying articles on a raft.
(b) Learning to swim holding on a plantain stem. 
(c) Life jackets used for boating 

13. What are the benefits of water being a universal solvent?
Answer:
• We use sugar in soft drinks.
• We use salt for food items
• We make soda water
• Medicines can be prepared.

14. What is the unit for measuring liquids?
Answer: Litre.

15. What is the unit for measuring small quantities of liquids?
Answer: Millilitre (ml).
10cm x10cm x 10cm = 1000 cubic centimetre
That is
71000 cubic centimetre = litre.
1 cubic centimetre can also be called 1 millilitre
Therefore
1 litre = 1000 millilitre.
16. Major Portion of Water on the Earth is ----------
Answer: Sea Water (96.5%)
Pure Water (3.5%)

17. What are the water sources in and around your house?
Answer:
• Wells
• Ponds
• Rivers

18. How can water bodies be prevented from becoming polluted?
Answer:
• Avoid water bodies from pollution.
• Clean every water body by removing pollutants.
• Governments should take necessary action to protect water bodies.
• Avoid dumping waste from fish and meat markets.

19. How do water bodies get polluted?
Answer:
• Washing vehicles and bathing cattle in the river.
• Throwing plastic wastes into water sources.
• Dumping waste materials from fish and meat markets.
• Dumping waste from factories.
• Water from sewages.
• Spraying pesticides in agricultural fields
20. How is rain formed?
Answer:
The water from water bodies and plants reach the atmosphere in the form of water vapour due to the heat of the sun. The water vapour condenses in the form of clouds, gets cooled and comes down as rain.

21. What is evaporation and condensation?
Answer:
(a) Evaporation is the process by which liquid changes into vapour due to heat.
Eg: Water changing into water vapour.
(b) Condensation is the process by which vapour changes into liquid on cooling.
Eg: Water vapour changing into water.

22. Write 7 water conservation methods.
Answer:
• Mud walls
• Rain harvesting pit
• Sloping land cut into different layers
• Preparing basins around trees
• Rainwater storage tank
• Rainwater into vells
• Silpaulin water storage tank

23. Disasters Caused by Rain
Answer:
• Floods
• Landslide
• Soil erosion
• Uprooting of trees
• Sea turbulences
• Mudslides
• Destruction of agriculture
• Destruction of houses and buildings
• Diseases of the rainy season

24. Life-Giving Water - More Questions & Extended Activities - Click here.
 
25. Life-Giving Water - Worksheets - Click here 




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