The sea may have been formed by tremendous rains. Or, it may have been formed by steam from inside the earth. Scientists think the earth was formed more than four and one-half billion years ago....
The wonder of water
The sea is, of course, water---the stuff we drink, wash in, cook with, and swim in, and the stuff that falls from the sky when it rains. Water is so common we take it for granted. But it's actually...
Plants of Long Ago
The plants that grew on earth hundreds of millions of years ago didn't look much like the plants we see around us today. Scientists have learned a great deal about what the world was like long ago....
Outdoor gardens
A little seed For me to sow . . . A little earth To make it grow . . . A little hole, A little pat . . . A little wish, And that is that. A little sun, A little shower . . . A little while, And...
Art in nature
Many beautiful creatures live on this earth. Some of them are so colorful that they look as though they were painted by a great artist. > The Wing of a Butterfly from Peru > Star Tortoise from...
Books to Read
If you like to read about the world and space, you'll find a wide variety of books to read and enjoy. A few of them are fisted below. Your school or your public library will have many others. Ages 5...
Volcano watchers
The ground shakes and quivers. Deep in the earth there is a roaring rumble. Suddenly, there is a giant explosion! A cloud of steam, mixed with dust and chunks of rocks, shoots out of the top of the...
Watching for earthquakes
Earthquakes happen all the time. We don't feel most of them. They are just small shakes in the earth. But some earthquakes make the ground tremble, rattle dishes, and even cause buildings to shake....
Learning about the earth
Who wants to study rocks? Geologists do. Geologists are scientists who "read" rocks as though they were history books. Rocks have a history of their own. They show geologists what the earth was like...
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...