The story of fire Worksheet-1
B. Paraffin wax
A. From dry grass
B. By rubbing stones
C. By striking sticksRead More...
The story of fire Worksheet-2
A. The decomposition of dead and decaying matter
A. Turn off the regulator of gas when not in use
B. We should not play with the fire
C. Lighter was used by the primitive man to produce heatRead More...