Page No 75:
Question 2:
Fill in the blanks:
(a) Burning of wood and coal causes _______ __ of air.
(b) A liquid fuel used in homes is ___________.
(c) Fuel must be heated to its ___________ before it starts burning.
(d) Fire produced by oil cannot be controlled by ________ _.
Page No 75:
Question 10:
Which zone of a flame does a goldsmith use for melting gold and silver and why?
Page No 75:
Question 13:
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
