Subject :NSO Class : Class 7
Arrange the following steps in a sequential order to explain the formation of convectional
currents through ventilation.
(p) Hot air passes out through the ventilators and creates low pressure
region in the room.
(q) The rooms are provided with ventilators
at the top.
(r) Hot air in the room is less denser and it rises up.
(s) The cold air enters into the room through windows from high pressure
to low pressure region.
A rpsq
B qrps
C qpsr
D qprs