Home >All Categories > Science & Mathematics >Earth Sciences & Geology >Open Question Minjesh Member since:25 September 2011Total points:90 (Level 1)If you have heard that in long ago there is no refrigerator. nowadays also in villages.cold substances,milk items,curd are kept under the ground(Land).so it’s temp can maintain for long time.is there any thermal properties of land or what.i have to give a assignment on this.if anyone find any details give a try to answer and link will be OK.help will be appreciated.Answer Question by darkflow… Member since:14 December 2006Total points:4,701 (Level 4)Heat is passed in 3 ways: conduction, convection, and radiation. Underneath the ground the sun can’t reach items (no radiation). Air is not circulating underground (no convection). The only heat source available is conduction, or heat passed through solid material. This reduced amount of heat source, keeps the heat low.
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