Discover the awesome answers to these and other fascinating mysteries in biology, chemistry, physics, earth science, and astronomy. Just try these 201 fun, safe low-cost experiments at home or in the classroom. You'll look through a drop of water to find out how a magnifying lens works. Using a Styrofoam ball, a pencil, and a lamp, you'll learn why the Moon appears and disappears. With just a jar and some ice cubes, you can demonstrate how rain is formed. Each experiment includes an illustration and easy to follow step by step instructions.