From Gummy Bears To Celery Stalks Diffusion And Osmosis Lab Answers

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• [GET] From Gummy Bears To Celery Stalks Diffusion And Osmosis Lab Answers

  He said the same thing hap- pens in the air when someone sprays perfume inside a room. At first the molecules of perfume are concentrated and strong smelling in a small area, but over time they diffuse through the air in the room until they are...

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• [FREE] From Gummy Bears To Celery Stalks Diffusion And Osmosis Lab Answers

  Passive transport does not require energy input from the cell. Sue: So, passive transport moves molecules across a cell membrane and does not require energy input from the cell because the necessary force is provided by the concentration gradient?...

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• Escogroup Org Practice Exam Education

  Questions Define the terms diffusion, passive transport, active transport, and osmosis. In each of your definitions, describe the role of a concentration gradient. Biological membranes are said to be selectively permeable or semipermeable. What does this term mean, and how does this affect the way that molecules are able to move through cellular membranes? Which type of molecule is more likely to quickly pass through a cellular membrane via simple diffusion, polar or nonpolar? You may need to use information from your textbook and class discussions to answer this question. What is the assignment? Jude: Each of us was given three gummy bears and these instructions: Step 1. Measure and record the starting length, width, and depth of all three gummy bears.

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• From Gummy Bears To Celery Stalks Page 5 Osmosis In Animal Cells Answer Key

  Step 2. Gather three glasses of the same size, and label them 1, 2, and 3. Step 3. In glass 1, add 1 inch of water and place one gummy bear inside. Step 4. Step 5. In glass 3, add nothing except the third gummy bear. Step 6. Cover all three glasses with plastic and leave overnight. Step 7. The next day, measure the final length, width, and depth of each gummy bear and calculate the ending volume. Step 8. Determine the change in volume of each gummy bear and record your results. Phillotson said we could weigh the gummy bears instead of measuring them with a ruler, but that it is easier to provide everyone with rulers than scales.

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• Observing Osmosis Gummy Bear Lab Answer Key

  Jude: We are also supposed to answer the following questions. Predict what will happen to the size of each of the gummy bears overnight. Explain how osmosis is related to the predictions you made in Question 2. Use your textbook or other re- sources to define the following terms: hypertonic solution, hypotonic solution, and isotonic solution.

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• From Gummy Bears To Celery Stalks Page 5 Osmosis In Animal Cells Answer Key Pdf

  Which terms from Question 4 describe the solutions in each of the glasses that the gummy bears were placed into? Answer the following questions after conducting the experiment: Record your results in Table 2, above. Did your observations match your predication? If no, explain what you think accounts for the difference. The gelatin in gummy bears forms a structural matrix that acts somewhat like a selectively permeable membrane, allowing passage of certain molecules but not others. Water will move in or out of the gummy bear matrix when placed in solutions of different tonicities in order to obtain equilibrium. The plasma membrane that sur- rounds RBCs and other animal cells is similarly selectively permeable; water will move across the mem- brane more readily than will solutes such as sodium chloride NaCl.

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• Welcome To Free Photos

  Similar to a gummy bear, the plasma membrane of an animal cell will shrivel up if there is a net loss of water from inside the cell. However, unlike a gummy bear, if there is a large net influx of water into the cell, the plasma membrane may break, and the cell will be destroyed. The bursting of the cell in that situation is called lysis. Questions The solute concentration in blood is equivalent to 0. In the lab section of Mr. Next, several drops of blood were added to three different solutions: 0. Solutions can be made by adding 9. Figure 2 shows how the RBCs appeared in the blood when viewed at X magnification. Label the three other panels by indicating which shows RBCs added to 0.

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• From Gummy Bears To Celery Stalks: Diffusion And Osmosis

  Below the panels, indicate whether each solution is isotonic, hypertonic, or hypotonic in relation to RBCs. IV fluid is not pure water, but is instead a saline solution water containing NaCl. What do you think is the appropriate NaCl con- centration for IV fluid? What would happen if pure water was used as IV fluid instead of saline solution? Part IV: Osmosis in plant cells Unlike gummy bears and animal cells, the cells of plants are surrounded by rigid cell walls.

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• Osmosis Worksheet

  These cell walls will prevent cells from bursting if there is a large net movement of water into the cell. However, when a plant cell swells because of a net influx of water, the cell wall can only expand so far before exerting pressure back on the cell, which is called turgor pressure. Many plants depend on turgor pressure and the firm, or turgid, state it creates to pro- vide structural support. If you have ever seen a houseplant or a stalk of celery go limp after not receiving water for a while, you have observed plant cells that have lost turgor pressure and become flaccid. Converse- ly, a significant net loss of water from inside a plant cell can cause its plasma membrane to pull away from the inside of the cell wall; this state is called plasmolysis.

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• Newburyparkhighschool.net

  Questions On a separate sheet of paper, draw three plant cells: one that is turgid, one that is flaccid, and one that is plasmolyzed. Indicate with arrows the direction of the net movement of water across the cell membrane. Underneath each cell you drew, write whether the plant that cell represents was placed in a hypertonic, hypotonic, or isotonic solution.

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• Gummy Bear Basketball Answer Key

  Figure 2: Design and describe an experiment using celery stalks to demonstrate how certain conditions will cause a loss or gain of turgor pressure. In order to follow the scientific method, your description should start with an observation and be followed by a a testable hypothesis, b an outline of the experiment that will test the hypothesis, c a description of the type of data that will be collected, and d a possible conclusion that could likely be made after completing the experiment and analyzing the data. Do you have a similar assignment and would want someone to complete it for you?

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• ALEX Lesson Plan

  Refrigerator recommended, but not required Procedure: Pre-lab Preparation This could be given to the student groups to do, but for the sake of safety it may be better to do ahead of time Cut celery into equal sized pieces that will fit into the cups about inches in length. Each group will need 6 pieces of celery. For each group, take 3 pieces of celery and cut slits on both sides. Make sure that the cuts are not so deep that the celery may be broken during the experiment or that structural integrity is lost. It is suggested that you make shallow horizontal slits on the outer side and shallow vertical slits on the inner side as shown below. Separate celery with slits and celery without slits into different containers to make it easier to pass out to students during the lab. If gummy bears will also be used, make sure that you have 3 gummy bears per group. Keep group size as small as possible to make sure all students have something to do during the lab. Have students collect cups, scales, table spoons, and stirring devices.

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• Lab Aids Answers Osmosis And Diffusion

  It is recommended that students label their cups using masking tape with numbers in order to more easily keep track of the different experiments. Students will fill 4 6 if concurrently doing gummy bears of their cups about halfway full with water. The remaining cups should be left empty as they will be used for controls. Students will need to prepare their hypertonic solutions by adding in salt to 2 3 for bears of their cups with water. Hand out 3 celery pieces without slits and 3 celery pieces with slits to each group or have them make them for themselves. If doing gummy bears, hand out 3 gummy bears to each group as well. Have students measure and write down the initial weights of their celery pieces and gummy bears in the quickwrite alongside any additional observations they find pertinent it might be advisable to have students write out their information on paper first and then transfer it over to the quickwrite once it is all measured for efficiency and to allow the experiment more time to sit.

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• Observing Osmosis In Gummy Bears Answer Key

  If doing gummy bears, have students measure the dimensions of the bears as best as possible if you would like them to calculate changes in volume. Have students place one of each of their samples celery without slits, celery with slits, and gummy bears into each of the experimental scenarios saltwater, water, no water. Have students write down their predictions of what changes they might observe based on their understanding of passive transport in the quickwrite note: In order to allow students to apply the concepts they will be witnessing, the teacher may consider having students to wait on making predictions for their gummy bears until after they have seen what happens to the celery [if gummy bears are being used concurrently].

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• Osmosis In Plant Cells Lab Answers - Free Photos

  Allow the samples to sit for 10 - 15 minutes. During this time, ask students to explain their predictions and why they believe those outcomes will occur. After 10 - 15 minutes, have students pull out and compare their celery samples the gummy bears should be left for a longer period of time [overnight is best]. Students should re-weigh their samples and write down these new measurements along with any additional changes they have noticed. Suggest that they try to bend the celery if they do not think to do so and order the samples by degree of pliability. Have them write down the changes they observe in the quickwrite. Ask students to evaluate their predictions in the quickwrite. Introduce students to the concepts of osmosis and tonicity. Have them try and use these concepts to explain the outcomes they observed. Introduce students to water potential if appropriate for grade level. Discuss the effect of exposed surface area on efficiency of diffusion with students as well as the everyday uses of osmosis.

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• Osmosis Experiments With Gummy Bears | Sciencing

  After enough time has passed, have students repeat steps 10 - 12 with their gummy bears. Students can compare relative size as well as take new measurements to calculate estimated volumes. Student prior knowledge: Students should be familiar with the concept of passive transport prior to participating in this demonstration. Explanation: Osmosis is the passive diffusion of water across a semi-permeable membrane in an effort to achieve equilibrium. To do so, water will typically flow unless affected by other forces such as pressure from an area that is less concentrated with solute or hypotonic to an area that is more concentrated with solute or hypertonic in order to balance the concentrations on both sides of the membrane. This can also be thought of as water moving from an area where it is proportionally more concentrated to an area where it is proportionally less concentrated in order to keep with the concept of moving down a concentration gradient.

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• Simple Candy Osmosis Experiment

  They will be able to compare the weights, stiffness, and size of their celery and gummy bears both before and after the experiment, thereby allowing them to tangibly experience osmosis. In regards to the gummy bears, the students will be able to easily see the change in size between the three different scenarios, as the gummies in hypotonic solution will noticeably swell while the ones in hypertonic solution will noticeably shrivel.

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• Download Lab Aids Answers Osmosis And Diffusion On Medicoguia.com

  As for the celery, students will be able to kinesthetically see the effects of osmosis as the celery pieces in salt water will become much more pliable while the celery pieces in pure water will stiffen. At the same time, they will also be able to compare the relative stiffness of the celery pieces with or without slits in order to see the effects of greater exposed surface area on the rate of diffusion. The teacher should be aware, though, of the likely possibility that students may attribute the greater degree of pliability to the slits themselves, and should be prepared to spin this suggestion into a class discussion that will guide students towards understanding of the effects of surface area on diffusion efficiency.

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• ALEX | Alabama Learning Exchange

  The experiential learning that this lab provides students can then be expanded upon through use of time lapse videos some of which have been linked below in order to show students a more drastic view of osmosis. Furthermore, the teacher can then discuss with students the everyday applications of osmosis in order to help them understand the practicality and accessibility of what they are learning. Why or why not? Yes, the concentration of the solute in the hypertonic solution does affect the rate of osmosis. The diffusion of water across a membrane is determined by the net water potential which is part affected by the relative concentration of solutes on either side of the semipermeable membrane, or the solute potential.

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• From Gummy Bears To Celery Stalks: Difiusion And Osmosis

  The greater the difference between these two concentrations, the greater the solute potential, which in turn results in a faster rate of osmosis as the system tries to progress towards equilibrium. Is it possible for water to travel through a semipermeable membrane going from the hypertonic side to the hypotonic side? Why would this be useful? Yes, it is possible to overcome the osmotic pressure created by the concentrations of solute on either side of the membrane through use of applied pressure, there by causing water to flow from the area of the membrane that is hypertonic to the area that is hypotonic.

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• Celery Stalks Diffusion And Osmosis By Kevin M Bonney Case Study - EssayLoop

  This process, known as reverse osmosis, is used in some filtration systems, such as when purifying water for drinking. Why could it be bad for a cell to be placed into an environment that is exceedingly hypotonic or hypertonic? The cell might experience a net movement of water that is too drastic for it to survive. For instance, if placed into an exceedingly hypotonic environment, too much water might passively move into the cell which could cause it to rupture. Likewise, placing a cell into an exceedingly hypertonic environment may cause it to lose too much water, also potentially resulting in its death. Applications to Everyday Life: Osmosis is one of the main reasons that salt water and fresh water fish must be raised in their respective environments. If, for instance, fresh water fish are placed into a salt water environment, then the differences in tonicity between the fish and the environment will cause a rapid loss of water from the fish, causing it to die.

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• Osmosis Experiments With Gummy Bears

  Likewise, placing a salt water fish into a fresh water environment will cause it to rapidly absorb water due to osmosis, also causing it to die. For those of you who wear contact lenses, osmosis and tonicity play a role in the development of contact solutions. The contact solutions must be produced to be isotonic or in osmotic equilibrium with your eyes in order for the contacts to not cause discomfort due to osmotic movement. You may have noticed this discomfort before if you have ever had to put a contact lens back in if it has fallen out after only rinsing it with tap water. Osmosis plays a huge role in the urinary system of animals. Manipulation of this pressure allows the body to recycle or remove water as necessary in order to help maintain homeostasis. This is particularly important for animals who live in areas with little water who need to be that much more efficient with their water use. Using pressure to overcome osmotic pressure and cause water to flow from a hypertonic to a hypotonic area, or reverse osmosis, is widely used as a filtration method, such as in the production of drinkable water.

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• JCST – July/August

  Placing flowers in water helps to keep them from wilting thanks to osmotic pressure. Photographs: Photographs have been used throughout this page. Videos: These time lapse videos can be used to provide a more dramatic look at the effects of osmosis over time for students.

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• Lab 1 Osmosis

  The red blood cells would increase in size because water is moving from the area of higher water potential the distilled water to the area of lower water potential the red blood cells until dynamic equilibrium is reached. Lab 1E Questions 1 After preparing a wet mount slide, I have observed the onion cells under magnification and they appear to be small, empty boxes pushed closely together. Error Analysis: Lab 1A — The data collected in this lab experiment did not seem to contain any inconsistencies, so therefore no human error is detected. Lab 1B — In this lab experiment, the data seems to be compliant with the data collected by the other lab groups, so no human error was thought to have happened. Lab 1C — There was some discrepancy in this experiment in the 1. The data decreases consistently until the 1. Some mistakes that could have taken place are miscalculations in initial and final masses or problems with the molarity of the solution itself.

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• Case Study: From Gummy Bears To Celery Stalks--Diffusion And Osmosis.

  Lab 1D — In this part of the lab, only calculations were made, so no human error probably occurred during this time. Lab 1E — In part 1E, after adding the NaCl solution to the onion cells, the cells should have reduced in size, but no reaction took place. This may have occurred in part because the onion itself was already dried out and dehydrated, or while the onion was being looked at through the microscope, the heat from it may have caused the cells to loose water.

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• 6 Easy Biology Science Experiments For Kids

  Conclusion: During the experiment conducted in Lab 1A, the results and data collected make it possible to conclude that glucose and Iodine Potassium Iodide can pass through a selectively permeable membrane and will if the concentrations on either side are not equal. In Lab 1B, it can be concluded that sucrose cannot pass over a selectively permeable membrane, but instead water molecules will move across the membrane to the area of lower water potential to reach dynamic equilibrium.

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• Gummy Bear Lab Answers

  Lab 1C provided information that helps to conclude that potatoes do contain sucrose molecules. This can be stated because the cores took in water while they were emerged in the distilled water. This means they had a lower water potential and higher solute potential than the distilled water. The solute potential is equal to about a 0. During Lab 1D calculations were made and questions were answered to help give a better understanding of water and solute potential. If the onion cell experiment in part 1E of the lab would have produced correct results, conclusions could have been made. It is thought that the onion cells would have plasmolyzed due to the addition of NaCl to the cells. This shows how the onion cells had high water potential and moved to the area outside the cell with lower water potential.

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• Osmosis (Mario Martinez) - S

  Then, after adding water back to the cells, water would have moved back into the cells increasing turgor pressure. The water potential played an enormous role in each part of this lab. Since water moves areas of high water potential to areas of low water potential, reactions took place in each part resulting in different conclusions being derived from them. Water potential was a key element in each part of the experiment. In plant and animal cells, loss or gain of water can have different effects.

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• Gummy Bear Lab Experiment Answers

  In a plant cell, it is ideal to have an isotonic solution. If the solution is hypertonic, the cell will shrivel from lack of water intake. Inversely, if the solution is hypotonic the cell could take in too much water and the cell will lyse and break open. For a plant cell, the ideal solution is a hypotonic solution because the cell takes in water increasing turgor pressure which keeps the cells tightly packed and keep their shape. If the solution is hypertonic, the cell will plasmolyze and died from lack of water. In an isotonic solution, the plant cell does not have enough turgor pressure to keep is shape.

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• Osmosis Worksheet

  Teacher will write this question on the board. Gummy Bear Osmosis Lab. Choose 4 gummy bears from the container. Again, this is due to diffusion. It showed me also that certain acidic liquids make the Osmosis in Celery Lab From gummy bears to celery stalks diffusion and osmosis lab answers. Results may vary depending on brand. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Showing top 8 worksheets in the category - Gummy Bear Osmosis. Oh Yeah! List at least 2 changes you think will happen.

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