WK1ASSGN_MCCALLUM_T

Week 1 Osmosis Lab Report Name: Tynasha McCallum Date: 12/01/23 Purpose: To apply the scientific method to observe and report on the process of osmosis and to investigate the effect of osmosis in cells in different solutions. Directions: Please read the Osmosis Lab instructions fully before beginning your experiment. Also read the textbook passages related to osmosis before filling out the report. Use this report form to record your predictions, observations, analysis,and conclusions. Please leave the report prompts intact and simply type your responses under each prompt . Because this report form is standard, SafeAssign will flag it with a large overlap score- do not concern yourself with this issue for this report. Hypotheses Reflect on your readings related to osmosis and cell membranes. Consider the four solutions in which you will immerse gummy bears. Briefly explain what you think will happen to the different gummy bears under the different conditions. Record which type of solution you prepared for Cup #4 in the appropriate table cell. Be as specific and as detailed as possible.Use the understanding of osmosis that you have developed from reading the text. Solution Hypothesis Water Only If the gummy bear is placed in only water then it will swell up Salt Water If the gummy bear is placed in salt water then it will shrink Sugar Water If the gummy bear is placed in sugar water then it will grow bigger Vinegar If the gummy bear is placed in the vinegar then it will shrink No Water If the gummy bear isn’t placed in any water it’ll stay the same

Materials and Methods See Osmosis Lab Instructions document for materials and methods. A metric ruler will be necessary to measure the length, height, and width in mm. Results Use the tables below to record your observations of the gummy bears after Part 1 of the lab and after Part 2 of the lab. Part 1 Results a. Record the measurements of the length, height, and width of your gummy bears in Table 1.1 before you place each of them in an experimental solution. Estimate the volume by multiplying the length x height x width. Table 1.1 Length, height, width of gummy bears (in millimeters, before treatment) Measur ement Cu p # 1 Cu p #2 Cu p #3 Cup #4 Cu p #5 Solution: wat er onl y Salt wat er Sug ar wat er Vin egar No liqu id Length (mm) 20 mm 20 mm 20 mm 20 mm 20 mm Height (mm) 10 mm 10 mm 10 mm 10m m 10 mm Width (mm) 10 mm 10 mm 10 mm 10 mm 10 mm Estimat ed Volume 200 0 20 00 20 00 200 0 20 00 b. Record the height of each of the experimental solutions you prepare before placing the gummy bears in the solutions.Record which type of solution you prepared for Cup #4 in the appropriate table cell. Table 1.2 Solution height measurement in mm (without gummy bears) Cup #1 Cup #2 Cup #3 Cup Cup #5

Height (mm) 13 mm 9 mm 13 mm 0 Width (mm) 13 mm 9 mm 13 mm 0 Estimated Volume 6,438.9 1,543.0 5 6,438.9 0 c. Record the height of each of the experimental solutions you prepare after removing the gummy bears in the solutions. Record which type of solution you prepared for Cup #4 in the appropriate table cell. Table 2.2 Solution height measurement in mm (aftertreatment, without gummy bears) Cup #1 Cup #2 Cup #3 Cup #4 Cup #5 Solution: Water only Salt water Sugar water Vinega r No liquid Height (mm) 13 mm 9 mm 13 mm 0 NA Analysis and Conclusion a. Compute the change in Length, height, width, and estimated volume of the gummy bears by subtracting the values for each in Table 1.1 from values from Table 2.1.Record the results in the first row of Table 3.1 (below). Record which type of solution you prepared for Cup #4 in the appropriate table cell. Table 3.1Changes in length, height, width, and estimated volume of gummy bears Measurement Cup # 1 Cup #2 Cup #3 Cup #4 Cup #5 Solution: water only Salt water Sugar water Vinega r No liquid Change in Length (Table 2.1- Table 1.1) 18.1 mm 0.95 mm 18.1 mm 20 mm Change in Height (Table 2.1- Table 3 mm 1mm 3 mm 10 mm

1.1) Change in Width (Table 2.1- Table 1.1) 3 mm 1 mm 3 mm 10 mm Change in Estimated Volume (Table 2.1- Table 1.1) 4438.9 456.95 4438.9 2000 b. Compute the change in solution height for each solution by subtracting the values in Table 1.2 from those in Table 2.2and recording the result in Table 3.2 (below). Record which type of solution you prepared for Cup #4 in the appropriate table cell. Table 3.2Solution height changes (before vs after treatment) Measurement Cup # 1 Cup #2 Cup #3 Cup #4 Cup #5 Solution: Water only Salt water Sugar water Vinega r No liquid Change in Height (Table 2.2 –Table 1.2) 3 1 3 10 NA c. Write at least two or more paragraphs analyzing your results. Include the following: •  Describe and explain your results. How do they relate to the phenomenon of osmosis? (You may need to conduct additional independent research and cite your source.) •  State whether you obtained the results you expected and explain why you did or did not get the expected results. •  Summarize the overall knowledge you gained from this lab. How do you think your results might apply to cells generally? My results were pretty much what I predicted. In both the regular water solution and sugar water the water moved through the gummy bear through osmosis due to there being more sugar molecules in the gummy bears than in the water. Which caused them to grow bigger. With the salt water the water moved out of the gelatin causing the gummy bear to shrink. With the vinegar