The Great Wall of China is a series of fortifications made of
stone, brick, tamped earth, wood, and other materials, generally built along an
east-to-west line across the historical northern borders of China in part to
protect the Chinese Empire or its prototypical states against intrusions by
various nomadic groups or military incursions by various warlike peoples or
forces. Several walls were being built as early as the 7th century BC; these,
later joined together and made bigger and stronger, are now collectively
referred to as the Great Wall.
Sunday, October 5, 2014
why do mountains affect weather
Mountains:
There are two sides: wayward and leeward.
Wayward: Whenever it is raining, the wayward side gets the
rain so there is good soil most of the time. But as the cloud goes up the
mountain, it keeps raining until soon there is no more water in the cloud.
Leeward:
Now the cloud is at the other side of the mountain. There is no more
precipitation so the leeward side of the mountain gets no rain so the flat
ground on this side of the mountain is dry and humid.
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