The wind moves over the land. It sways the tops of tall grass in meadows and sets leaves a-rustle in the woods. It scatters the smoke from chimneys. It lifts up limp flags and makes them flap. It...
Air can push!
You're like a fish living at the bottom of the ocean. But you live at the bottom of an ocean of air! Miles (kilometers) of water are piled up above the fish, and miles of air are piled up above you. ...
Where the air came from
Scientists think the earth's atmosphere has changed during the billions of years since the earth was formed. At first, the atmosphere was probably very different from what it is now. It began to...
Why is the sky blue?
I don't suppose you happen to know Why the sky is blue? It's because the snow Takes out the white. That leaves it clean For the trees and grass to take out the green. Then pears and bananas start to...
Is air something?
live without it. Almost every kind of animal and plant in the world must have oxygen or it will die. Only about one-fifth of the air is made up of oxygen. Most of the air---nearly four-fifths of...
A wrapper of air
Long ago, people believed that the sky was a shiny metal roof stretched over the earth! Now, of course, we know what the sky really is. It's simply air---a covering of air around the earth. Air is...
Air, Wind, Clouds, and Weather
Air, Wind, Clouds, and Weather Air, Wind, Clouds, and Weather
Hot-water fountains in the earth
On a bare, rocky patch of land sits a cone-shaped hump of rock with a hole in its top. Suddenly, with a hiss, a great, silvery spray of steam shoots up out of the hole. A geyser has erupted. Geysers...
Water beneath your feet
All the earth's water isn't in seas, lakes, ponds, and rivers. A lot of it is beneath your feet---down in the ground. When rain falls, much of the water seeps down through the soil. It keeps going...
Holes full of water
A lake is the exact opposite of an island. An island is a piece of land that has water all around it. A lake, or a pond, is water that has land all around it. Some of the places we call seas, such as...