LESSON VII.
HOW TO TELL DISTANCE.
To tell where a place is, we must know its direction. But this is not all; we must also know how far it is from us; that is; its distance. To find this out we measure.
You have often heard of an inch, a foot, and a yard. This line is one inch long:
Your ruler is twelve inches long, that is a foot. Three lengths of your ruler make a yard. A yard stick is three feet long.
| MEASURING SHORT DISTANCES. |
With these measures you can tell how long your slate or your desk is, or how long and wide the schoolroom is.
The inch, foot, and yard are used for measuring short distances. But when we wish to tell the distance between objects far apart, we use another measure called a mile. A mile is much longer than a yard.
Think of some object that is a mile from our schoolhouse. How long would it take you to walk that distance?