Question
What do you understand by the term ventilation? How do convection currents in air help during ventilation?
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Answer
The process by which impure and warm air inside a room is continuously replaced by fresh air from outside is called ventilation. The carbon dioxide rich exhaled air , being warm and lighter rises up It then passes out through the ventilators in a room This causes a drop in pressure within the room Thus the cold can fresh air enters from the doors and windows to fill up the gap This continuous circulation of air is maintained with the room by convection currents.
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