Ms. Frizzle's class learn about the incredible systems that work together to make the human body function.

Describes how crystals form in nature, how crystals are grown artificially, and how crystals are used in industry. Numerous color photos with text identify the various gemstones. "Discover the beauty of emeralds, rubies, lapis lazuli, jade, silver, and gold in this glittering collection of precious stones and metals. Learn where crystals can be found, how they form, and what they are used for--from dazzling jewelry to diamond-cutting tools and the...

"Learn how to design, build and customize 20 mini-projects in Minecraft, from firefighter planes and deep-sea submarines to hidden bunkers and arcade games. There's even a superhero flying school! With detailed instructions, block hacks and build tips, this book will teach you new tricks and help you practice old skills as you create bite-size builds to impress your friends in Minecraft."-- Provided by publisher.