It's a bitterly cold winter day. Snow lies in a great white sheet on the ground and on the roof of your house. The roof is warm from the heat inside the house, so the snow on the roof is slowly...
Clouds airplanes make
Have you ever looked up and seen a jet airplane high in the sky? Sometimes you will see what looks like a trail of white smoke stretched out behind the plane. This trail is a cloud made by the jet. ...
Homemade clouds
You can make a cloud! In fact, you probably have made clouds many, many times. All you need is a cold day. Just open your mouth and blow a puff of breath into the cold air. For just a moment, you'll...
Clouds on the earth
> fog under the Golden Gate Bridge, California Eeee-rump! Eeee-rump! The growly sound of a foghorn echoes in the night. A thick, gray fog creeps in from the ocean and settles over the waterfront....
Squeezing water from air
Water is almost always in the air around you, even when you can't see it or feel it. Here is an experiment that will show you how clouds form when cold air and warm air come together. You'll need: a...
Floating water in the air
Clouds. Sometimes they look like big gobs of whipped cream in the sky, and sometimes like soft, floating feathers. Sometimes they're white as milk, and sometimes as dark and gloomy as an angry frown....
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. ...
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...