Oxygen is an incredible element, both on its own and combined with others. From the air we breathe to the water we drink, oxygen is an essential element for life as we know it. This informative introduction to oxygen teaches readers about its discovery and many uses. A handy quiz at the end lets readers test their knowledge. Illustrations and photographs bring the lesson into sharp focus, while a stylish design engages readers. Accessible, straightforward text makes learning about this important topic a breeze.