When you put a piece of iron into a glass of water, whichever is hotter should start release some of the energy into the other causing the temperature to balance out and be the same. So your answer would be, Heat will flow from the piece of iron, into the the water in the glass balancing out the temperature.
Geographical advantages produced a more well-developed society. Egypt, for example, had great natural barriers such as deserts and cataracts. Due to their good geographical location, they created a more advanced civilization. Thus, geography is linked to history because they both work together to produce a better society.
To only allow through certain items, and block the rest.
