Which way are you going? A compass can tell you. A compass is a box with a magnetic pointer or needle that turns. The marked end of the needle always points north. Why? Because it is pulled by a...
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...
All kinds of maps
Maps show you all kinds of things about the earth and space. The kind of map you probably know best is a road map. This kind of map shows roads, cities, rivers, and important places. You use road...
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a meteorologist using a computer map to forecast the weather a pilot and weather forecaster using flight charts and weather maps
Places on paper
> a globe is a model of the earth You can't put a globe in your pocket. A big, round globe is too bulky to carry from place to place. That's why there are maps. Travelers can easily fold paper...
The big, blue marble
The earth looks like a big, blue marble to astronauts flying in outer space. It's easy for them to see the round shape of the earth because the astronauts are so far away. But how can you see the...
Where in the World?
Where in the World? Where in the World?
Sky “fireworks”
People who live far enough north or far enough south are often treated to a giant "fireworks" display on clear nights. Great sheets of light seem to hang in the sky, rippling and wavering like...
Waves from space
Right this minute you're being hit by "bullets" from outer space! Space is full of waves. These aren't the kind of waves you see on an ocean, of course. They are waves of radiation. Radiation is...
Other galaxies
Our galaxy, the Milky Way, has more than a hundred billion stars. But it is not the only such "cloud" of stars in space. There are at least a billion other galaxies, and probably more, and each of...
