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What was the reason civilizations began along river valley?
Most ancient civilizations needed the fertile land, food sources (water-based fowl, fish, etc.), and trading opportunities found near rivers to support their community. Over time, commerce and population would grow, and with it would develop a full-fledged civilization. They could then use their clever location to defend themselves from attackers, to reach other main hubs of civilization to trade, and to establish a navy. hi guys
Where the world first cities arose?
Egypt
Was the water clock the first clock in the world?
It was an old fashion water clock. As a method of telling time, the Sun could be considered the oldest clock in the world. Just by looking at its position relative to the ground, early humans could tell if it was morning, midday, evening, and nighttime. The sundial was developed as a more accurate way to tell this time, and eventually the water clock, mechanical clock and digital clock came along as steadily more accurate versions.
Explane why the first civilizations all developed in river valleys?
Because, Animals go down there to drink, which is a source of food. You need water to live. Also good soil and trees, use the trees for your fire and homes, use soil to grow crops and spring flooding makes the water good for crops.
What was Louis bleriot the first person to do in 1909?
the world's first flight over a large body of water in a heavier-than-air craft.
