Tag Archives: science
Why do we perspire?
The sweat glands help keep you cool in the summer. When we get very warm, little beads of water called sweat form on our skin. Perspiration is a quick method of cooling off the body. You can test this by wetting your hands and waving them rapidly. The water evaporates quickly and makes your hands …
How are natural diamonds formed?
Diamonds are formed in dying volcanoes. As the hot lava cools, great pressure and heat act on the carbon found in the lava and change the carbon into diamonds. You may know that a diamond is simply a crystal of common carbon, of which coal is largely formed. Diamonds were formed millions of years ago in …
What is a watermark?
If you hold a piece of writing paper up to the light you may see a design of some kind. The design may include the words “rag content” and a picture of an eagle, crown or some other symbol such marking are called “watermarks.” Watermarks are trademarks which paper makers put in their better quality …
How does a plant make its food?
Green plants make food in their leaves in a special food-making process called “photosynthesis.” Green plants make food in their leaves in a special food-making process called “photosynthesis” (pronounced foe toe SIN three sis), a word meaning “putting together with light.” A leaf manufactures food by taking carbon dioxide from the air and water from …
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