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Why Does Water Put out a Fire?
Why Does Water Put out a Fire? When a fireman squirts water on the burning wall of a building, he is putting the fire…
What Causes Geysers?
What Causes Geysers? A geyser is a vent in Earth's surface that periodically ejects a column of hot water and steam. A geyser is…
What Are Truffles?
Truffles are rare edible fungus that grows underground, usually at the base of certain types of trees. Similar to mushrooms, truffles can lo
What Is at the Center of the Earth?
What Is at the Center of the Earth? By studying earthquakes, scientists have discovered that the inside of the earth is divided into three…
How Did the Days of the Week Get Their Names?
Weekdays were named in honor of the sun and moon, and for the ancient gods. The Romans named the first two days of the…