Roman citizens were divided up into two distinct classes: the plebeians and the patricians. The patricians were the wealthy upper class people. Everyone else was considered a plebeian.
Patricians
The patricians were the ruling class of the early Roman Empire. Only certain families were part of the patrician class and you had to be born a patrician. The patricians were only a small percentage of the Roman population, but they held all the power.
Plebeians
All the other citizens of Rome were Plebeians. Plebeians were the farmers, craftsmen, laborers, and soldiers of Rome.
The difference between atmosphere and hydrosphere is :
Basically Hydrosphere Includes all of the water that cover more than 70 % of Earth's surface
While atmosphere is the layers that protect the earth from Outer space material
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