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Biology 4th Block Rot Race Lab Report Name Rot Race Purpose To see how fast organisms and materials decay under certain conditions Procedure We gathered 4 2-liter plastic pop bottles and cut them to assemble the drawing below Near the bottom we placed a siv to let juices drain through into the bottom 2-liter Then we stacked materials and organisms on top of each other until it was about 20 cm tall We then randomly poked holes into the sides of the pop bottles to let air escape This is the order we placed the materials from top to bottom 2 cups of dirt 13 pieces of melon I cup of soil 3 chunks of wax 2 cut up bananas 4 slices of apple 1 banana peel many slices of carrot peelings 1 cinnamon roll apple sauce 1 slice of bread and then the siv Next we let it sit and made observations every Tuesday and Friday We checked the color change smell height cm temperature degrees Celsius mass lbs Ph and we checked for living organisms Drawing of set-up Conclusion After the experiment we decided that the bread decomposed the best I believe this because the bread was the most porous which allowed more bacteria could get to it We also decided that the wax decomposed the worst because it was the hardest and most compact We knew that decomposition was taking place because mold was growing on some of the material and the height and mass were decreasing When an organism decays it loses it size and mass just like our rot column Improve One of the ways that we could have improved our experiment is by placing the material on top of the other material and let it set instead of mashing it and mixing it together Also we could
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