The mighty Superman can move faster than a speeding bullet---but how fast is that? A tiny snail creeps along at what is called a "snail's pace"---but how slow is that? There's an easy way to measure...
Measuring wind speed
Weather forecasters, aviators, sailors, and some other people often need to know exactly how hard the wind is blowing. To find out, they use an instrument called an anemometer (an uh MAHM uh tuhr)....
How hard is the wind blowing?
A gentle breeze ruffles your hair. A strong breeze may turn your umbrella inside out. On these pages you will find out how to tell how hard the wind is blowing by watching what it does. And you will...
The Hare and the Tortoise
by Aesop The Hare was once boasting of his speed before the other animals. "I have never yet been beaten," said he. "When I put forth my full speed, I can run faster than any of you. I challenge...