They are called sediments or grains..
Explanation:
In the atmosphere, as the air gets warmer, it rises up. When the air gets cooler, it sinks down. Same goes for oceans. When the water gets warmer due to either sunshine or geothermic properties, it rises up as surface currents which have their own unique pathway
E I’m pretty sure but not absolutely positive tell me if I get it right have a great day or night :)
Eratosthenes lived in Alexandria of Egypt in BC 240.. He found out the diameter of Earth thorough geometry and mathematics. Hope this helps .. :)
Italy is surrounded by sea, meaning that there is always accessible trade routes through water. In earlier days, water trade routes became much more popular due to not having to travel through rough terrain. Therefore, the economy boosted as trade increased.