Why Are There Locks on Some Canals and Rivers?
Locks are watertight chambers which enable boats to ascend or descend to different levels in a canal or river. The lock is usually rectangular…
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Level
What Is a Benthic Zone?
The benthic zone refers to freshwater, brackish, and saltwater environments. Depending on the water body, the benthic zone may include areas
What Is Sea Level?
We say that Mount McKinley in Alaska is 20,320 feet above sea level, or that Death Valley, in California, is 282 feet below sea level. And w
How Does a Siphon Work?
How Does a Siphon Work? A siphon is a self-powered pump. Fill a rubber tube with water and pinch the ends to keep the water in. Put one end
How Far Away Is the Horizon?
The distance to the horizon, the imaginary line where the sky seems to meet the earth, depends on how high our eyes are above the level of t