Why Is the Egg Yolk Known as the Food Store?
Why Is the Egg Yolk Known as the Food Store? When an animal lays eggs, the yolk is the portion of the egg that contains nutrients and serves primarily to feed the...
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Why Does Paper Turn Yellow with Age?
Why Does Paper Turn Yellow with Age? Oxidation causes paper to turn yellow with age. Most paper is made of plant fibers that have been bleached white. After a time, the...
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What Is Fool’s Gold?
What Is Fool’s Gold? Many prospectors have found what seemed to be gold, but instead turned out to be a bright yellow mineral called “iron pyrite.” Looking...
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What Is Margarine Made From?
Margarine is a manufactured mixture of vegetable fats and oils. Margarine was created in the early 1800’s as an inexpensive substitute for butter. Most people...
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Do Insects Have Blood?
Do Insects Have Blood? Yes. Not only does an insect have blood, it also has a heart that pumps the blood throughout its body. The heart is a tube-shaped vessel...
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