A method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
B, because federations is a union federal state self governed and when the American founders took over America, they took it from the Indians.
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ethanol
Explanation:
I don't know what to put here but it needs to be 20 words long
137 local administrative units
Answer:
North Africa is mostly desert. But the ancient Egyptians found that they could grow crops by irrigation ditches from the Nile River
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