When it's not windy, it can be easy to forget about air. But air is everywhere-it fills your house, your car, and even your empty milk glass. In fact, a regular room holds about 75 pounds of it This Level 1 book, reillustrated with John O'Brien's clever, eye-catching illustrations, tells you how to discover the air that's all around you.

Are the stars out tonight?

If they are, chances are you'll be able to spot the Big Dipper. The Big Dipper is one of the easiest constellations to recognize and this Let's-Read-and-Find-Out Science book will help young stargazers find it, and it's companion, the Little Dipper. And once you've begun to learn about the constellations, well, the sky's the limit

Don't jump

If you're on the space shuttle, that is. Astronauts never jump in space. They usually drink out of straws, and they lift tons of equipment as if it were light as air. Find out more in this information-packed voyage into space.

After rain comes down, the sun comes out and dries the puddles. But the water isn't gone. The heat from the sun has turned it into water vapor-it has evaporated. Eventually, this moisture in the air condenses to form new clouds. Soon the rain will fall again. Read on to find out all the ups and downpours of the water cycle

Did you know that the moon doesn't make its own light? Instead, it receives light from the sun and reflects it to us on the Earth. Read and find out about how the sun, the stars and light bulbs make light so we can see.Did you know that moonlight is really sunlight? The moon can't make its own light, so it receives light from the sun and then sends it to us here on the Earth.

Any child who's ever wondered about the fascinating properties of light will want to read this classic science title. Readers will even learn how fast light can travel: from the...

What is it like?
For thousands of years people looked up at the moon and wondered about it. Now we know what the moon is like. There is no air on the moon and nothing grows, but there are towering mountains and deep craters--and much more

Colder than the desert, the hotter than the desert, the moon is an amazing place to explore.

What goes up must come down.

Everybody knows that. But what is it that pulls everything from rocks to rockets toward the center of the earth? It's gravity. Nobody can say exactly what it is, but gravity is there, pulling on everything, all the time. With the help of an adventurous scientist and his fun-loving dog, you can read and find out about this mysterious force.

The sun brings heat, warmth, and energy to the Earth. What is the sun made of? How big is it? How far away? Read and find out

Snow is falling. Snow is wonderful - for sledding, for skiing, and for building snowmen. But did you know that snow can actually keep things warm? Find out how snow helpf plants, animals, and people to survive. But when a blizzard blows, watch out The snow that is so useful can be dangerous too.

Franklyn M. Branley and Holly Keller team up for a fun and colorful exploration of the world of snow, including experiments and activities for cold winter days. A Let's Read and Find Out Science book, for Stage 1.