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 Rain 2 Phytoplankton 3 Decomposers 4 Photosynthesis 5 Nitrogen fixing bacteria Changes atmospheric nitrogen to usable nitrogen photosynthetic organism a form of precipitation feeds on dead organism process in which plants make their food