QUESTION 5 a) (4 marks) During a fire, hot gases are produced and mixed with the air. For a person trapped in a burning building, it is always wise to get low and crawl to the nearest exit. Explain why this advisable using the idea of convection. (2) b) Many houses in PNG use galvanized roofing iron. Most of the roofing iron sold in PNG is painted silver instead of black. Explain what might happen if a house was built with black roofing iron instead of silver roofing iron.
