Nearly everything that lives in the water is food for a hungry fish. In the ocean, most fish eat only other fish. Ocean cod, hake, tarpon, and tuna dine on smaller herrings, sardines, and…
Black Widow Spider Some spiders hang nets of silk from corners or branches. Many people don’t like spiders. But spiders help us. They eat many insects that are harmful to people. Some spiders trap…
It’s easy to see how a pair of scissors works. Every time you squeeze the handles together, the blades cut into the paper. Using a pair of scissors is simple—but scissors are not a simple machine….
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