photosynthesis and resperation

in the beginning of the week we made up a flow chart for two things. they were respiration and photosynthesis. for humans/ animals we decided for respiration that we breath in oxygen and out CO2. also that all living things breath or respirate. then for photosynthesis we decided that it is only for plants. they breath in co2 and let out oxygen for us to breath. this also helps the plant turn green.they also need sunlight to photosynthesis. we learned this by a video thing wit questions and other stuff.then the next day we decided to test and see if the plant needed all these things to photosynthesis (light, water and CO2). two table groups would do each experiment. our table did the water. we put a spinach leaf into both meaning two of the containers and put water in one and not in the other to see if the one without water would still photosynthesis. we put it near a light bulb also. the next day we came in and checked the oxygen levels. the normal level was 2o6ppt. then with the one with water its level was -17 ppt nd the without water was about 0 ppt. if to much CO2 built up over night the top popped off. we just learned about that most of the week.