Answer:
Cold weather fronts usually move from northwest to southeast. The air behind a cold front is colder and drier than the air in front. When a cold front passes through, temperatures can drop more than 15 degrees within an hour. ... When a warm front passes, the air becomes noticeably warmer and more humid than it was before.
Nile Valley civilizations such as Egyptian or Kush, have developed thanks to the Nile River. The fact that this river flows through the desert areas makes its significance even greater, as during the flood, the desert soil turned into a fertile land, attracting communities of people to have entire plantations on their coasts, whose ability to live, the possibility of rich and varied cultivation of plants, as well as attracting an animal for water. The Nile consists of two rivers, White and Blue Nile, flowing through Upper Egypt, flowing through wild rapids, narrow cliffs, and boulders, sprinkling minerals and other ingredients from these areas and merging into a river Nile and its floating makes offshore soil rich minerals in which plant breeding is possible. Liquid through Lower Egypt, Nile enters the Mediterranean, making the delta before the casting, which allows even greater flooding in the delta area, and therefore larger fertile areas.
