When Does Sheet Lightning Occur?
When Does Sheet Lightning Occur? Sheet lightning usually occurs during a storm as the result of a discharge of excess electricity within a single thundercloud. The...
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What Is Twilight?
What Is Twilight? Twilight is the faint light which appears a little before sunrise and again after sunset before it gets really dark. On the Moon there is no twilight....
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Why Is There More Sea than Land on the Earth’s Surface?
Why Is There More Sea than Land on the Earth’s Surface? The answer to this question lies in the composition of the rocks which make up the outer portion of the earth’s...
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What Is a Mirage?
What Is a Mirage? Mirages are optical illusions produced by extraordinary atmospheric conditions. They can be non-existent sheets of water or similar visions, inverted...
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What Is an Aerosol?
What Is an Aerosol? An aerosol consists of fine particles of liquid or solid substances suspended in the air, or in any other gas. It is not, as many people think,...
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