Web Reference: Oct 19, 2023 · An igloo keeps you warm by trapping your body heat. Igloos are made of compressed snow. Almost 95% of this snow is trapped air which is a good insulator. This insulation prevents the loss of body heat, and thereby keeps us warm. The ideal snow for igloo building strikes a delicate balance – it is neither too fluffy nor overly dense. The snow is extracted from the ground and sufficiently packed to ensure structural integrity yet retains air pockets crucial for insulation. Here’s how they do it: Igloos work by blocking cold winds while preserving heat generated by your own body temperature. The insulation provided by densely packed snow and ice stops your body’s natural heat from escaping right out into the atmosphere—keeping it inside the igloo itself.
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