Watch as mixtures merge and matter changes state. Discover how some chemical changes can be reversed, yet others can't, and why some reactions happen with a bang! See bacteria at work in the world around us, and even inside the human digestive system. Understand the tricks that light plays, and unlock the secrets of electricity to find out how it powers the bulbs in your home. Whether it's elements, evolution, or energy, the world of science is brought to life by stunning photographic explanations that answer the biggest and smallest questions about our universe.

At head of title: DK Smithsonian. Die-cut holes in cover. Includes index.

Matter -- Reactions -- Materials -- Energy -- Forces -- Life -- Earth -- Reference.