What Is Saint Elmo’s Fire?
Saint Elmo’s fire is the name given to the glow of light that is sometimes seen on ship masts, airplane wings and church steeples during a thunderstorm. It is...
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Why Can’t We See the Stars in Daytime?
Why Can’t We See the Stars in Daytime? The stars shine all the time, day and night. We do not see them in daytime because of the glare of sunlight. The sun’s...
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What Makes the Wind Blow?
What Makes the Wind Blow? Wind is air in motion. Wind is caused mainly by the uneven heating of the air around the earth by the sun. Since the earth’s surface is made...
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Why Does a Jet Plane Leave a Vapor Trail?
Why Does a Jet Plane Leave a Vapor Trail? The white streaks planes leave behind are actually artificial clouds called contrails, which is a shortened version of the...
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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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