3 If three different sized cubes of gel are put into vinegar then the one with

# 3 if three different sized cubes of gel are put into

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3. If three different sized cubes of gel are put into vinegar then the one with the smallest SA:V ratio will allow the vinegar to diffuse into the fastest , proving that Adriann Lausen Demi Dobbin AP Bio # 3 Mrs. Houseman 20 September 2019

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small cells are more efficient than big ones. This experiment will test this hypothesis by demonstrating that the small cube diffuses faster than the big cubes. The data from this experiment are expected to show that high SA:V ratio is the most efficient. Methodology: This experiment was designed using pink gel that had a chemical that turned pink when touching a base and white when the gel touched an acid. The gel was cut into three different sizes of cubes; then the surface area and volume of each cube was measured. (SA=6 ✕a2 V=B✕W✕H).The cubes were then all put into three separate cups and 100ml of vinegar was poured onto of each at the same time. When the smallest cube had turned halfway white all the cubes were taken out of the vinegar. The white part of all the cubes was cut off, and then the cubes surface area and volume were remeasured. Results: The results of this lab did prove the hypothesis correct, and answer the question that a high SA:V ratio is more efficient. The cube with the largest surface area to volume ratio, was the cube that diffused the fastest in the vingar. Cube #3 was the smallest cube and it had the largest SA:V ratio. At the beginning the ratio was 6.6 and at the end the ratio was 6, which was still the largest ratio compared to all the other cubes. Table 1 below shows the comparisons between all the different cubes. Tables and Graphs: Table 1: Cube SA Before Volume Before Ratio SA After Volume After Ratio 1 30 7.5 4.5 11.6 3.75 3.09 2 40 7.5 5.3 9.5 4.5 2.11 3 10 1.5 6.6 6 1 6 Adriann Lausen Demi Dobbin AP Bio # 3 Mrs. Houseman 20 September 2019
Graph 1: * This graph shows that cube 3 have the largest SA:V ratio but was the smallest cube. Discussion: The data that was collected is significant because it shows that the smaller cubes diffuse faster. The smallest cubes also had that largest SA:V ratio. So when this data is applied to cells, it can be said that the cells that are small and have a large SA:V ratio are the most efficient cells when it comes to being able to diffuse things. The results did reflect what the hypothesis initially stated in the introduction. Error analysis: There could have been many sources of error in this experiment, the biggest one being that the measurements of the cubes could have been off and that could have skewed results greatly. Also the cubes could have been pulled out of the acidic solution at different times and this would affect the data because they all needed to be in the solution for the same amount of time. Another source of error could have been that after pulling the cubes out of the water amount cut off was not very accurate or specific. If this lab is repeated again these sources of error need to be controlled to make sure the results are correct. They could all be fixed if more time and precaution was applied when doing this experiment and double checking all the work.

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