Why Are Some Clothes Dry Cleaned?
Why Are Some Clothes Dry Cleaned? Many clothes or fabrics are dry clean only and can be damaged with traditional washing. These clothes or fabrics will shrink, stretch,...
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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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What Puts the Chew in Chewing Gum?
The “chew” in chewing gum is provided by a chewy plastic mixed with natural gums from trees. At the chewing-gum factory, the chewy gum base is mixed with...
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What Makes Plant Leaves Green?
What Makes Plant Leaves Green? The green we see in leaves comes from a green substance called “chlorophyll,” which the plant uses in making food. Chlorophyll is found...
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How Do We Measure the Height of a Mountain?
How Do We Measure the Height of a Mountain? Most of our figures for mountain heights were obtained with an “altimeter.” This is kind of barometer that uses...
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What Is Local Mean Sea Level?
What Is Local Mean Sea Level? Sea level is the base level for measuring elevation and depth on Earth. Because the ocean is one continuous body of water, its surface...
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Why Do Jellyfish Sting?
Jellyfish sting in order to get food. A jellyfish is a simple, primitive sea animal with a jelly-like body. Jellyfish live in the ocean and usually don’t bother...
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What Are My Taste Buds?
Your tongue is covered with little bumps that are called “papillae”. Inside each papillae are special cells that form your taste buds. Liquids in your mouth wet the...
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Is the Tomato a Fruit or Vegetable?
Is the Tomato a Fruit or Vegetable? Although we use tomatoes as vegetables, they are actually classified by botanists as fruits. The word “fruit” usually...
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Why Do the Mimosa’s Leaves Close When Touched?
Why Do the Mimosa’s Leaves Close When Touched? The mimosa plant is a touchy plant. It is so sensitive that it closes up when touched. The leaves of certain mimosas...
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