<span>In terms of matter and resources, the Earth is essentially a closed system, because matter and resources are fixed.
</span>In terms of energy, the Earth is an open system, because there is a balanced transfer of energy. (The energy<span> radiates into the </span>Earth's system<span>, from the Sun and</span><span> then it is radiated back into space from the </span>Earth. The<span> flows of energy are regulated by the </span>Earth's<span> atmosphere and ozone layer.)</span>
Climate and resource availability.
Answer:The Sahara Desert limited how much land the Egyptians could settle.
Explanation:
Well do you know the definition of prehistory? you should look up the meaning of both words and compare and contrast them
Answer: A region having little rainfall because it is sheltered from prevailing rain-bearing winds by a range of hills.
Explanation: A rain shadow is a dry area on the leeward side of a mountainous area (away from the wind). The mountains block the passage of rain-producing weather systems and cast a "shadow" of dryness behind them.
