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 the Mimosa’s Leaves Close When Touched?
Why Do the Mimosa’s Leaves Close When Touched? The mimosa plant is a touchy plant. It is so sensitive that it closes up when touched. The leaves of certain mimosas...
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Can Ducks Swim Without Being Taught?
Can Ducks Swim Without Being Taught? Like all young waterfowl, ducks don’t have to be taught how to swim. A baby duck knows how to swim as soon as it hatches from...
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What Causes Rainbows?
What Causes Rainbows? When the sun is out during or right after a shower, a rainbow appears in the sky. When sunlight strikes the drops of water in the air, the...
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How Does a City Purify Its Water?
How Does a City Purify Its Water? Water in its natural state is often dirty, and usually must be purified to be safe for consumption. After water is drawn from a lake...
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