We live on the surface of the earth. The surface, or crust of the earth, is made of rock. In some places, it is covered with soil. In many places, it is covered with water. All around it is air. ...
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...
How was the earth born?
Why is the earth shaped like a ball? Why isn't it shaped like a block? Or why isn't it round and flat, like a pie? Why does it spin? And why does it whirl around and around the sun? Most scientists...
Around and around the sun
The earth doesn't just spin---it also moves through space. Right this very moment, the earth is rushing through space at tremendous speed---more than 66,000 miles (106,000 kilometers) an hour. It...
The spinning world
You may think our world, the earth, is standing still. But it isn't. The earth is spinning around and around, like a huge top. Push a stick through a ball of clay and then twirl the stick. The clay...
An island in space
We live on an island. An island in space! An island is a piece of land with water all around it. The earth is a giant ball of rock and metal with space all around it. A ball of rock and metal such...
Our Home, the Earth
Our Home, the Earth Our Home, the Earth
World and Space
The volume explores earth—what it is, how it came to be, how it makes life possible; weather; planets, stars, galaxies; maps, globes, compasses; and the work of people who study the world and space.
