Why Is the Ocean Salty?
Why Is the Ocean Salty? The salt in the ocean comes from the earth’s crust. Since the very beginning of the earth’s history, water on its surface has been...
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What Is Local Mean Sea Level?
What Is Local Mean Sea Level? Sea level is the base level for measuring elevation and depth on Earth. Because the ocean is one continuous body of water, its surface...
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Why Do Jellyfish Sting?
Jellyfish sting in order to get food. A jellyfish is a simple, primitive sea animal with a jelly-like body. Jellyfish live in the ocean and usually don’t bother...
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How Do Scientists Measure the Depth of the Ocean?
How Do Scientists Measure the Depth of the Ocean? Historically, before scientists developed new techniques, the depth of the ocean was actually measured by sending a...
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Why Do Lemmings Go on a Death March to the Sea?
Why Do Lemmings Go on a Death March to the Sea? According to legend, every three or four years, the lemmings of Norway march to the sea and drown themselves. These...
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