What Makes Thunder?
What Makes Thunder? A bolt of lightning is a big electric spark. During a thunderstorm, electrical charges are built up in the clouds. When the charge becomes strong...
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How Is Soap Made?
When you wash with soap, you are using a cleaning material made chiefly of animal fats, vegetable oils and an alkali chemical. In the soap factory, the soap materials...
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How Does a Tree Make Sap?
How Does a Tree Make Sap? Sap is the liquid that flows through trees and other plants and helps them live and grow. The roots of a tree draw from the soil a combination...
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What Happens to a Lost Balloon?
What Happens to a Lost Balloon? The toy balloon sold at fairs that tugs on the end of a string is filled with a gas that is much lighter than the air around it. If you...
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How Are Bubbles Put into Soda Pop?
How Are Bubbles Put into Soda Pop? The bubbles in your favorite soft drink are made by a colorless, tasteless gas called carbon dioxide. This bubbly gas gives soda its...
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