In Ancient Greece, geography was a significant barrier to transportation and communication, especially for trading and military purposes. The waters of the Aegean Sea were one barrier. The many distinct mountain ranges and hills made up yet another barrier.
The word 'ancient' is both an adjective and a noun. The noun ancient is a singular, common, abstract noun; a word for an aged person; the plural form is a word for the civilized peoples of ancient times and especially of Greece and Rome.The word 'door' is a noun, a singular, common, concrete noun. The noun door is a word for a hinged, sliding, or revolving barrier at the entrance to a building, room, or vehicle; a portal.
When the nomadic Greek peoples settled in Greece, the various tribes took over a section of river valley or plain surrounded by mountains, separated from each other and so established separate communities and governance.
The city of Rome was (and still is) between the Apennines (a chain of mountains which runs through the Italian peninsula) and the coast of the Tyrrhenian Sea. It was 14 miles from the sea (now it is 16 miles form the sea). It lied by the only ford on river Tiber. Originally it consisted of the Seven Hills of Rome. Later it spread beyond these hills. Past these hills there is a plain of average agricultural fertility. The Alps and the plain of the river Po in the North, the Adriatic Sea in the east, the Ionian Sea and the plain of Apulia in the south, the Tyrrhenian Sea in the west , the Tuscan hills in the centre, and the mentioned Apennines were all (and still are) in Italy.
Until the end of the republic, the senate consisted of aristocrats from the old patrician families. It was very difficult for a man to break the social barrier,even if he had the money and good fortune to be elected to the office of quaestor, which gave him an automatic seat in the senate. But it could be done. Cicero was a prime example of a "New Man" reaching the office of counsul. After the principate was established, the emperor could appoint senators. Augustus, himself raised certain men to senatorial rank, his friend and co-ruler Marcus Agrippa, was just one.
The Apennines.
Alps Mountain.
Himalayas mounttain is unique because of its ancient barrier between Anient India and the rest of Asia.
what separated ancient china from the rest of the world is the natural barriers like the deserts and mountains , oceans .
a barrier
,utd
Permeation of a protective material is when something you need protection from is able to pass through some protective material to reach you without seriously altering the structure of the protective material. If a hazardous material is able to permeate something you are using for a protective barrier, it is not a good choice for a barrier.
It is the Himalayan Mountain Range that forms a natural barrier between China and India.
cell membrane
it burt
The Appalachian Mountains ran across the Southern Colonies in North America. They served as a natural barrier that influenced the settlement patterns and economic activities of the region.
The mountain barrier that influences the rainfall pattern in Pakistan by intercepting monsoon winds from the south is the Hindu Kush mountain range. This range acts as a barrier to the moist air masses, forcing them to rise and cool, resulting in precipitation on the windward side (northern side) and creating a rain shadow effect on the leeward side (southern side) of the mountains.