Why Is the Sky Blue?
The daytime sky is blue because of what happens to sunlight as it enters the Earth’s atmosphere. When the Sun is low near the horizon as it rises or sets, the...
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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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Why Do You Sweat?
Why Do You Sweat? Sweating is a natural biological process that starts soon after you are born. It is one of the ways your body has to cool off when you become too...
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What Causes a Rainbow?
What Causes a Rainbow? After a shower of rain there is often a rainbow. Rainbows form when the sun begins to shine through the clouds while the air is still filled with...
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Why Does the Highway Look Wet on a Hot Day?
Why Does the Highway Look Wet on a Hot Day? On a summer day you may have noticed a pool of water ahead of you in the road. When you get closer, the pool of water...
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