Matching Pairs Cycling of MatterOnline version Many living things, including humans, take in oxygen and release carbon dioxide. The interaction of the carbon and oxygen cycles is one example of a relationship between different types of matter in ecosystems. by Sadaf Khan 1 Nitrogen fixing bacteria 2 Photosynthesis 3 Rain 4 Phytoplankton 5 Decomposers photosynthetic organism a form of precipitation feeds on dead organism Changes atmospheric nitrogen to usable nitrogen process in which plants make their food