In what is called the English, or customary, system of measurement, there are 12 inches in a foot, 3 feet in a yard, 16£ feet in a rod, and 5,280 feet in a mile. Why such odd numbers? Well, it's...
THE BIG ROCK
If you walk around a certain rock in Australia, you really go on a hike---a five-mile (8-kilometer) hike. This great rock is a mile and a half (2.4 kilometers) long and a mile (1.6 kilometers) wide....
How far is it?
A map may be millions of times smaller than the real land it pictures. So how can you find out how far it is from one place to another? To find out, you use a "measuring stick" called a scale. Scale...
A “star” with a tail
> Night after night, a long, shining streak hung in the sky. It looked > like a big, bright star with a glowing tail. Each night it seemed to > grow bigger and brighter. People were terrified. "It's...
A many-ringed planet
The sixth planet from the sun is Saturn. It is the second largest planet---nearly ten times bigger than the earth. Saturn is named after the Roman god of farming. It has a rocky center, probably...
The red planet
At night, you can sometimes see a bright "star" that shines with a reddish gleam. It is Mars, the "red planet," named after the Roman god of war. Mars is the fourth planet from the sun ---about 142...
Our next-door neighbor
As earth whirls along on its endless journey through space, it has a companion that is always beside it--- the moon. The moon is a small planet. It is only about one-fourth as big as earth. The moon...
The bright giant
It's a Fact About 1,300,000 planets the size of earth could be packed into the sun. Millions of miles (kilometers) out in space there is a gigantic ball of hot, glowing gas we call the sun. The...
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...
What’s inside the earth?
Could you dig a hole to the other side of the earth? No, you couldn't. The center of the earth is about 4,000 miles (6,400 kilometers) beneath your feet. So, it's almost 8,000 miles (13,000...
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