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4,609 Essays on Science. Documents 2,911 - 2,940
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Osmosis
Osmosis Aim: To determine the concentration of cell sap in a potato cell. Osmosis is the movement of water through a semi-permeable membrane. It starts from a weak solution and becomes a more stronger solution until the concentrations on both sides are equal. To investigate the range of solutions needed to find the point at which the surrounding solution is the same as the cell sap in the vacuole. 0 molar - No salt 0.2
Rating:Essay Length: 599 Words / 3 PagesSubmitted: November 13, 2009 -
Osmosis
Practical Report Experiment 4 & 5 Diffusion and Osmosis Experiment: 5 Osmosis- The movement of water Aim: To observe the effects of the movement of water into and out of cells. Hypothesis: I think the potato in the salt water will become soft and the potato in the distilled water will stay firm. Method: 1. The potato was peeled and cut in to two 2cm cubes. 2. One potato was placed in a beaker of
Rating:Essay Length: 299 Words / 2 PagesSubmitted: November 15, 2009 -
Osmosis
The following is a short sample from this piece of coursework: ... els of sucrose solution to distilled water (see molarity table above) and I placed each of the mixtures into the correct beakers. 5. Then I weighed all the potato chips on an electronic balance (see results) and recorded the results. 6. I placed 5 pieces of potato into each beaker and left them for approx 36 hrs. 7. After this time I drained
Rating:Essay Length: 483 Words / 2 PagesSubmitted: November 23, 2009 -
Osmosis
Osmosis Investigation Introduction & Aims At present I am investigating Osmosis, and I have devised a experiment to investigate the rate of it. I have been provided with potatoes, and all the common laboratory equipment. I will look at 2 variables, one discontinuous, one continuous. For my discontinuous veritable I have chosen TYPE OF POTATO. I will have 3 different types of potato, chosen randomly, and numbered A, B & C. For my continuous veritable
Rating:Essay Length: 807 Words / 4 PagesSubmitted: November 24, 2009 -
Osmosis
AIM: to test the theory of osmosis we will put several equal potato slices in different concentration of sucrose solution and observe the changes in the weight of the potato EQUIPMENT: potato, potato chips, sucrose solution 0-10, 5 beakers and scales to weight the potatoes PREDICITON: the potatoes will weight more in different solutions after 10 minutes in the sucrose. THEORY: osmosis is the name to describe the diffusion of water through a partly permeable
Rating:Essay Length: 574 Words / 3 PagesSubmitted: December 3, 2009 -
Osmosis
The experiment was very successful in my opinion. I obtained a large quantity of very accurate results from which I was able to create informative graphs. I think I took easily enough results for the amount of concentrations that I was using, and the time that I used for the experiment to last was enough to allow sufficient osmosis to occur. However if I was to repeat the experiment I might well increase the time
Rating:Essay Length: 407 Words / 2 PagesSubmitted: December 11, 2009 -
Osmosis
Aim: The aim of this investigation is to compare & evaluate the effects of osmosis in potato chips. We aim to find out the different outcomes that can (and will) take place when the potato chips are placed in different amounts of concentrated solutions (Sucrose Concentration). Scientific Knowledge: * Water is absorbed by the potato chip due to the Potato Chip being permeable. * Potatoes will increase in size. * Potatoes will become more flexible.
Rating:Essay Length: 502 Words / 3 PagesSubmitted: December 22, 2009 -
Osmosis
INTRODUCTION Osmosis is defined as the movement of water from an area of high concentration of water to an area of low concentration of water. “Kinetic molecular theory of matter this theory states that all matter whether it exists as a liquid, gas, or solid in a state of constant motion. The molecules that make up the matter are always moving in random fashion.” (lab # 5 pg. 1) “Passive Transport the transport of
Rating:Essay Length: 1,378 Words / 6 PagesSubmitted: December 26, 2009 -
Osmosis
Methods and Materials: To test the hypothesis that the rate of osmosis is positively related to the difference in the osmolarities of the solutions on the two sides of the membrane, we needed to fill up one side of the membrane with a liquid. First, we filled three culture dishes about half full of ordinary tap water which has an osmolarity of zero. We then labeled each dish; the first was labeled 0%, the second
Rating:Essay Length: 958 Words / 4 PagesSubmitted: January 7, 2010 -
Osmosis
Aim: The aim of this experiment is to investigate the movement of water into and out of plant cells by osmosis. The cells chosen for study will be taken from potato tubes as they provide a ready supply of homogeneous material. I did the investigation in two parts, the first part of my investigation was my preliminary investigation and then I did my official investigation. In both of my investigations there are several similarities, such
Rating:Essay Length: 507 Words / 3 PagesSubmitted: February 12, 2010 -
Osmosis
In this case study I will be looking at how osmosis affects a potato chip. My aim is too investigate the effect of varying concentrations of a certain salt solutions; and water, on the amount of osmotic activity between the solution and a potato chip of a given size and mass. Osmosis Osmosis is the movement of a solvent, usually water, through a semi-permeable membrane. The solvent moves from a low concentration to high
Rating:Essay Length: 488 Words / 2 PagesSubmitted: March 10, 2010 -
Osmosis
The purpose of undergoing the lab was to analyze the process of diffusion through semisolids. Along with investigating the course of diffusion, focusing on the path of osmosis was additionally significant. In order to comprehend these vital developments, a definition is necessary. In the structure of a cell, “diffusion is the random movement of molecules from the area of higher concentration to the area of lower concentration, until they are equally distributed” (Mader, 2006). There
Rating:Essay Length: 502 Words / 3 PagesSubmitted: April 20, 2010 -
Osmosis - Evaluation + Conclusion
Conclusion and Evaluation Conclusion In our test we put six different sliced up potatoes chips in solutions. The solution was different concentration of salt and water, one was 5% sugar, one 10%, one 15%, one 20% and one 30% salt concentration. We measured the mass of the potatoes chip before and after we put it into the solution. To keep the experiment fair we only changed one variable which was the salt concentration. The results
Rating:Essay Length: 538 Words / 3 PagesSubmitted: December 4, 2009 -
Osmosis and Potatoes
Osmosis is a specialised form of diffusion. Water moves from an area of LOW concentration of Solute to an area of HIGH concentration of solute through a semi-or fully permeable membrane by the process. Water moves constantly through the cell’s membrane its estimated that about 250 times the volume of a single cell moves through 1 per second This continues until the solute concentration reaches equilibrium It is convenient to express the available energy per
Rating:Essay Length: 1,233 Words / 5 PagesSubmitted: November 24, 2009 -
Osmosis Courswork
Analysis The trend that my graph and results show is that when the potato was placed in a solution that had a higher concentration than the chip itself, the potato lost weight (0.4, 0.6, 0.8 and 1.0 molars). In the same way when the potato chip was placed in a solution that had a lower concentration than itself, the potato chip gained weight (0.0 and 0.2 molars). For my results I calculated the percentage gain/loss
Rating:Essay Length: 720 Words / 3 PagesSubmitted: April 5, 2010 -
Osmosis in a Patato Chip
OSMOSIS IN A POTATO CHIP Aim: To investigate the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato chip of a given size. _____________________________________________________________________ Aim: To investigate the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato chip of a given size. Osmosis is defined as the net movement of water
Rating:Essay Length: 2,051 Words / 9 PagesSubmitted: November 29, 2009 -
Osmosis in onion Cell
The aim of the sixteenth of November experiments was to observe how three different solutions with various sucrose concentration influenced osmosis in relation to three onion cells and the impact on the cells structure. A small square of a red onion skin (membrane) was observed under a microscope at high power (X40) magnification. The observation showed a large number of onion cells. The structure of one onion cell had a general rectangular shape with a
Rating:Essay Length: 670 Words / 3 PagesSubmitted: May 13, 2010 -
Osmosis in Potato Chips
The biological importance of water and its role in living organisms What is water? Water (from the Old English word water) is a colourless, tasteless, and odourless substance that is essential to all known forms of life and is known also as the most universal solvent. Water has a very simple atomic structure, the structure consist of two hydrogen atoms bonded to an oxygen atom, which can also be related to as hydrogen oxide.
Rating:Essay Length: 573 Words / 3 PagesSubmitted: March 21, 2010 -
Osmosis in Potato Course Work
What affect does concentration of solution have on potato tissue? In my preliminary investigation, I will be controlling the following variables: • length of potato cylinder; • amount of solution / water; • type of potato; • size of potato; • temperature of water; • same ruler / person. Changing the concentration of solution: Using three glass test tubes, I will set up the following configuration: • Test tube 1 - Distilled water; • Test
Rating:Essay Length: 332 Words / 2 PagesSubmitted: March 5, 2010 -
Osmosis in Potatoes
Potato Osmosis Introduction: A shipwrecked sailor is stranded on a small desert island with no fresh water to drink. They know they could last without food for up to a month, but if they didn't have water to drink they will be dead within a week. Hoping to postpone the inevitable, their thirst drives them to drink the salty seawater. They are dead in two days. Why do you think drinking seawater killed the sailor
Rating:Essay Length: 689 Words / 3 PagesSubmitted: January 22, 2010 -
Osmosis Investigation
Osmosis investigation Aim: To investigate how sugar concentration affects the mass or size of a potato and find out the sugar solution. Introduction: Osmosis is the movement of water molecules across a partially permeable membrane form a region of high water concentration to a region of low water concentration until the concentration on both sides is equal. This means that osmosis is like diffusion involving water molecules. Osmosis occurs across a partially permeable membrane, with
Rating:Essay Length: 922 Words / 4 PagesSubmitted: November 9, 2009 -
Osmosis Start
Investigate osmosis between potato tissue and sugar solutions. Aim: To investigate the effect of varying concentration of a certain sugar solution on the amount of osmotic activity between the solution and a potato core of a given size 10mm Hypothesis: Osmosis is defined as the net movement of water or any other solutions molecules from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must
Rating:Essay Length: 420 Words / 2 PagesSubmitted: November 9, 2009 -
Osmosis Theory
OSMOSIS Osmosis Theory Diagrams available in any science book Osmosis is the diffusion of a solvent through a partially permeable membrane until there is an equal concentration on either side of the membrane. The partially permeable membrane contains pores that are very small. Because these pores are only very small, only certain molecules can pass through it. Usually though the membrane will allow all or none of the molecules through. When only one type of
Rating:Essay Length: 905 Words / 4 PagesSubmitted: January 3, 2010 -
Osmosis with Potato Chips
My Investigation on osmosis Osmosis is a special kind of diffusion. While diffusion can describe the movement of any kind of molecule, osmosis is only about the movement of water molecules. To show this diffusion I will be using potato discs, of the same size and mass, in different concentrations of sugar solution to find out whether the mass of the discs increases or decreases depending on the concentration. I predict that when the sugar
Rating:Essay Length: 633 Words / 3 PagesSubmitted: May 12, 2010 -
Osteoarthritis
Osteoarthritis Questions and Answers (Q&A) Q: What Is Osteoarthritis? Answer: Osteoarthritis, or OA, is a disease that causes the cartilage in your joints to break down. Cartilage is a smooth substance that protects the ends of your bones and helps your joints move. The break down of the smooth substance called cartilage causes joint pain and stiffness. Osteoarthritis is one of the most common diseases in people. It is estimated that nearly 21 million people
Rating:Essay Length: 1,359 Words / 6 PagesSubmitted: December 28, 2009 -
Osteoarthritis
Osteoarthritis There are over 100 different types of arthritis conditions affecting over 20 million people in the United States, of those Osteoarthritis is the most common. It affects as many pople as all other types of arthritis combined. Arthritis is the leading cause of disability among older adults. Joint diseases account for half of all chronic conditions in persons aged 65 years and over. The prevalence of Osteoarthirtis is high and will get even higher
Rating:Essay Length: 789 Words / 4 PagesSubmitted: February 7, 2010 -
Osteoarthritis
Assessment History The patient presents with knee pain and the radiographs have shown degenerative changes which suggest degenerative joint disease-osteoarthritis. Osteoarthritis is the most common clinical presentation in orthopaedics. Although the most probable causes of the patients symptoms is osteoarthritis, a full history and examination is required to exclude other possible causes such as inflammatory arthritis and trauma. In addition to the site of the pain the patient presents with it is important to elicit;
Rating:Essay Length: 1,944 Words / 8 PagesSubmitted: March 21, 2010 -
Osteochondrosis Infographic
??????? ????? ???????????? ???????????? ?????? ?????? ????? osteochondrosis infographic desease Wirbelsäule spinal disease infographic ???? ? ??? ????????? ???????????? Statistics spinal disease ??????? ???? ????????????/?????????????? ???????? ??????????? ???????????? ?? ?????????? ???????? ?????? ????? ??????????????. ????? ?????????? ??? ??????????? ???????????? ????? ??????? ????? ?? ???????? ?????? ??????????????????. ????????? ?????? ????????, ??? ??????????? ???????????? – ??? ????? ???????? ?? ??? ????????????? ? ??????? ?? ?????? ????????. ?????? ???? ??????????? ???????????? - ???????????? ??????????????? ????????? ????????????. ????? ????????????
Rating:Essay Length: 1,132 Words / 5 PagesSubmitted: May 2, 2011 -
Osteoporosis
Fatima Nicholls 2 Cranberry Ave. St. Thomas, VI 00802 November 10, 1996 Mr. Alvis Lockhart 1415 Estate Thomas St. Thomas, VI 00802 Mr. Lockhart: My advisors at Grovner Coop have suggested that I write to you regarding my plan to build a recreational park in St.Thomas. I would like to request your help on this project. I plan to build a recreational park in the Bolongo area. There are about 8 acres presently for sale,
Rating:Essay Length: 393 Words / 2 PagesSubmitted: November 13, 2009 -
Osteoporosis
Special Assignment NutritionDefine Type 1 and Type 2 osteoporosis, and explain habits that increase a person’s risk of developing osteoporosis.Type 1 osteoporosis is characterized as post menopausal. Women who are approaching the age of menopause should seriously consider consulting a physician to prepare for the changes her body is about to go through. As estrogen levels taper off, the kidneys start to draw calcium the body needs for normal maintenance of the skeletal frame
Rating:Essay Length: 441 Words / 2 PagesSubmitted: February 14, 2010