This content resource takes a look at the oxygen/carbon dioxide cycle and at the process of photosynthesis. The interactive Flash presentation features three sections: The Cycle, Atomic Shuffle, and Three Puzzlers. The Cycle section has an animation that illustrates the flow of carbon dioxide and oxygen between a plant and the surrounding environment. The Atomic Shuffle section has an annotated stepwise animation that explains the basics of photosynthesis. The Three Puzzlers section has three "big picture" questions with explanations.

This resource is not a complete lesson. It could be incorporated into a lesson or unit on photosynthesis or the carbon cycle. (author/ts)