The gum which sticks to the knife while cutting a jack fruit is removed using kerosene. Which property of kerosene is utilised here?

Important Questions on Life - Giving Water

MEDIUM

5th Kerala Board

IMPORTANT

Basic Science Part 1>Chapter 2 - Life - Giving Water>12

Let us try the experiment done by Haseeb and Anand. Take salt, sand, sugar, kerosene, coriander powder, potassium permanganate, sugar candy, chilli powder, coconut oil, blue vitriol (hydrated copper sulphate), stone and glycerine in separate glass tumblers. Add water and stir each of them. Tabulate your observations.

Water-soluble	Water-insoluble

EASY

5th Kerala Board

IMPORTANT

Basic Science Part 1>Chapter 2 - Life - Giving Water>17

What happens to the water in the water bodies when it receives heat from the sun?

MEDIUM

5th Kerala Board

IMPORTANT

Basic Science Part 1>Chapter 2 - Life - Giving Water>17

Doesn’t water which is so essential for life also becomes a destroyer at times? Do you have such experiences?

MEDIUM

5th Kerala Board

IMPORTANT

Basic Science Part 1>Chapter 2 - Life - Giving Water>Let us assess>Q 1

Among the various properties of water, which are applicable to the following situations?

i) Water shortage due to excessive sand mining in rivers.
ii) The water shortage caused in nearby wells due to the exploitation of water from a well rich in water.

MEDIUM

5th Kerala Board

IMPORTANT

Basic Science Part 1>Chapter 2 - Life - Giving Water>Let us assess>Q 3

We have discussed various methods of disaster management and prevention. Find out a few methods to escape from natural calamities which are a threat to your place. Compile the information collected and prepare a notice for the attention of the local population.

HARD

5th Kerala Board

IMPORTANT

Basic Science Part 1>Chapter 2 - Life - Giving Water>Let us assess>Q 4

Complete the following illustration related to water.

Question Image