Building Bridges! Forces act on everything, even things that are standing still. Engineers need to understand forces when they build structures such as bridges. Let’s see how different bridges support the forces that are placed upon them.
What are natural resources? Why is it important to prevent natural resources from being wasted? Explore Natural Resources! answers these questions. 25 projects inspire readers ages 6-9 to have fun while learning why resources are crucial to all life and how everyone can take care of earth’s resources by reducing, reusing, and recycling. With projects ranging from creating solar catchers to calculating their water footprint, children will discover that everything comes from the earth.
Make Your Own Model Lungs! Lungs aren’t muscles that move themselves. Instead, they depend on air pressure in your chest cavity and movement from your diaphragm and chest muscles to inflate and deflate. Here’s how you can see this in action.