Moles are commonly found in the older child and adolescent. Large amounts of dark pigment in the cells give moles their color. Moles may be black, brown, gray, purple, or bluish black. Some may also…
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….
You may think our world, the earth, is standing still. But it isn’t. The earth is spinning around and around, like a huge top. Push a stick through a ball of clay and then twirl the stick. The clay…
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