Water covers more than 70 percent of Earth’s surface, and all of it is connected in the never-ending water cycle. A substance that can cut through solid rock, destroy cities, sculpt mountains and coastlines, and affect climate, water is a mighty force in nature. The power of moving water, such as in rivers, changes Earth’s landscape, creating valleys and deep canyons over time.
When you step into a full bathtub, you learn a lot about displacement of water. As your body sinks into the tub, the water moves out of the way. But water is also pushing up on you as you enter into it. "Why Do Ships Float?" reveals the science behind buoyancy and why objects float, even if they are large cruise or military vessels. Colorful photographs and illustrations will enthrall young readers on this voyage through science.
Disney Educational - Bill Nye The Science Guy - Amphibians
Bill Nye is determined to get kids interested in science, and will go to great lengths to do so. His series engages students with jokes, music videos, and all manner of special effects, but the science instruction is solid. In Bill Nye the Science Guy: Amphibians, he talks about those cold-blooded creatures that can live on land or in water. They may have a reputation for being somewhat slimy, but amphibians go through the process ...
Earth is filled with a wonderful variety of land formations that range from towering mountains to sandy deserts and deep canyons. In All About Land Formations, children will examine these and other earthly structures while learning about the forces that created them. A fun, hands-on investigation demonstrates why moving water is a powerful force that can change Earth's surface in a hurry...
