symbiosis, relationship between two living organisms no one of the die, prey, the animal that is killed and eaten by another animal, predator, the animal that hunt kill and eat another animal, commensalism, a symbiotic relationship, competition, a relationship between giraffes and elephants, oxygen, a gas taken during respiration process, carbon cycle, the cycling of carbon between living organisms and the air, decomposers, living organisms that eat dead plants and animals and release carbon dioxide to the air, Carbon dioxide, gas taken during photosynthesis process, sleet, one form of precipitation, condensation, change water vapor into clouds, respiration, process by which carbon dioxide released in the air, Conservation, law states that matter can be cycled, parasitism, relationship between flee and dogs

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