Read and find out about one of nature's most mysterious forces-the earthquake. Some earthquakes are so small that you don't even feel them, while others can make even big buildings shake! Learn why earthquakes happen, where they are most likely to occur, and what to do if one happens near you.

Can you see the moon? Does it look like a big round ball? Or is it just a sliver of light in the sky? The moon seems to change. But it doesn't really. The moon revolves around the Earth. It takes about four weeks to make the journey, and as it travels round we can only see certain parts of it. Try the simple experiment described inside using an orange, a pencil, and a flashlight, and you'll understand why the moon seems to change. -- Provided by publisher....

Read and find out about the ups and downpours of the water cycle! With colorful illustrations and engaging text, Down Comes the Rain is a fascinating look into the stages of the water cycle. 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....

Examines life aboard a space shuttle, describing how astronauts deal with weightlessness, how they eat and exercise, some of the work they do, and more.