Science Assignment B.S 9 (11/11/2024)

Answer all questions
  

1. (a)

 

Explain the term convection as used in heat energy.


    (b)

 

Explain why convection cannot take place in solids.


2. (a) Explain each of the following terms:

(i)

 

soft water;

(ii)

 

hard water.


 (b)

 

State two methods of softening hard water.


(c)

 

(i)

 

Write a balanced chemical equation to show how water is formed

(ii)

 

State four physical properties of water.


3. (i) In what two ways does mulching help to conserve the soil?


(ii)

 

Give two examples of mulching materials.


Sir Bernard (Nkwatia D/A JHS "B")