Oxygen is essential to life on Earth, but what is this tasteless, colorless, element? From how oxygen was discovered to how it supports life, this book answers all your questions about element we all depend on. Readers will learn about atoms, molecules, and how oxygen fits in the periodic table. Discussions of photosynthesis, combustion, and oxygen compounds explore the role of oxygen in our world. Interesting and accessible explanations of chemistry terms are accompanied by lively illustrations and images.