What Is Humidity?
Humidity is the amount of moisture, or water vapor (water in the form of a gas) in the air around us. There is always some water vapor in th
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Gas
Where Does the Wax Go When a Candle Burns?
Where Does the Wax Go When a Candle Burns? The wax that doesn’t drip down the side of a burning candle turns into a gas that produces the br
How Did Volcanoes Get Their Name?
How Did Volcanoes Get Their Name? Volcanoes were named after Vulcan — the ancient Roman god of fire and metals. According to Roman legend,
What Is a Comet?
A comet is a huge ball of ice and space rock that orbits the sun deep in space. Occasionally, one passes near the earth and the sun. As it a
Why Does Knuckle Cracking Make a Popping Sound?
Why Does Knuckle Cracking Make a Popping Sound? Our entire body is made of a skeleton of 206 bones. Bones help in giving shape and support t