91.HOW BIG IS THE BIGGEST BEAR?
Because a bear can stand up on its hindlegs, and because some bears are pretty huge, indeed, all kinds of exaggerated tales have sprung up about them. There are legends about great hunters who fought with or killed giant bears.
90.WHY DOES CORK FLOAT?
The little boy who brings his line to the old fishing hole uses a piece of cork as a “floater” without ever wondering what keeps that piece of cork bobbing on top of the water. But the capacity of cork to float has been known since ancient times, and cork life-preservers saved many a life thousands of years ago!
Cork is much lighter than water. The reason it floats is that water does not easily penetrate the walls of the cells, which are filled with air. This prevents the cork from becoming water-logged and sinking.
89.WHY DOES A TOP SPIN?
If you put a pencil on a table and give it a twist, it will spin around several times. So will a ball, or in fact, any object that you can make turn. So what makes a top spin, is the force, or energy, you apply to it.
But what keeps a top spinning? And why does it keep spinning in a certain position!
