outside temperature is -35
inside temperature is -10
difference = -35-(-10)
=-35+10
= -25 degree C
Ice is good insulator of heat. house form ice is called IGLOO. It is warmer because
1. Ice is naturally and easily available in Greenland
2. Size of house is just enough for the persons they live
3. No window only one entrance
4, It's entrance made lower level than surface and long tube like. so no wind enter, heat can not easily escape from it.