Osmosis Lab Report by Evan Gerber Claire Cambron First Lab Report Wednesday 10:30am February 20‚ 2013 Theresa Gburek Abstract The major objective of the experiment was to test the effect of the concentration gradient on the diffusion rate. It was hypothesized that the greater the stronger the concentration gradient‚ the faster the rate of diffusion would be. To test this‚ dialysis tubes were submerged in different concentration fructose solutions. We weighed the tubes at specific
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Throughout the World different areas experience underpopulation and overpopulation at different times due to the unpredictable and complex practise of migration. Underpopulation occurs when there are far more resources in an area‚ such as food energy and minerals‚ than can be used by the people living there. Overpopulation occurs when there are too many people and not enough resources and technology to support these people. Countries such as China and Bangladesh have overpopulation as there are often
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Osmosis in Potato Tubers Andrew Dickson Background When a plant cell is bathed in a solution of the same concentration (isotonic) as its intracellular environment‚ its mass and volume remain the same. This is because water enters and leaves the cells at the same rate. There is no net loss or gain of water by osmosis. Samples of cells can be placed in a range of solutions of different concentration. The cells will gain water by osmosis when placed in solutions which are more dilute (hypotonic)
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2. How is the colour related to surface temperature of the star? The correlation between the surface temperature of a star and its colour is due to the phenomena known as black body radiation .A star is a black body‚where it aborbs all the radiation falling upon it.AS its temperatures gets hotter thanits surrounding‚the star radiates its on electromagnetic radiation‚known as black body radiation. This radiation is distributed unevenly but contionously through multiple wavelengths of the electromagnetic
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colds and other unwelcome guests." (www.mayoclinic.com) Depression is a serious biologic disease that affects millions of people. It affects all ages‚ genders‚ races‚ and economic levels. However it seems to slightly discriminate. Women are at a significantly greater risk than men to develop major depression. Research shows that episodes of depression occur twice as frequently in women as it does in men. Although anyone can develop depression‚ some types of depression‚ including major depression
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Osmosis and Diffusion Lab Observations: Diffusion: | Before | After | Color of liquid sack | clear | blue | Color of liquid in beaker | dirty yellow | golden | Glucose present Stick Test | no | yes | Color of the test stick | No change in color | Green | Osmosis: | Fresh | Salt | Beginning mass of potato | 2.51 | 2.16 | Texture of potato | Dry | Dry | Overnight mass | 3.12 | 1.84 | Overnight Texture | Hard‚ strong | Squishy‚ pliable | Data and Analysis: Diffusion:
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Does the Mass of a Material Affect it Aerodynamics? There are five basic steps of the scientific method‚ step one is to make observations step two is to come up a hypothesis. Step three is to make a experiment to test the hypothesis‚ step four is to test the hypothesis and step five is to either reject or accept the hypothesis. Scientific method is important because it is a series of techniques that helps you keep track and correct any mistakes‚ and to show others how you got to the result. In
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Demonstrating Osmosis in Potato Conclusion The data we had did not support the definition of Osmosis‚ Osmosis is the diffusion of water through a partially permeable membrane from a region of lower solute concentration to a region of higher solute concentration; the data we collected did not seem to fit into this. The potato chips were suppose to lose more mass in the higher concentrated solution as the water from the potato chip will flow out to the higher concentrated solution as the water inside
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Bobby Chang English 1102 Warwick April 27‚ 2002 How does music affect one’s intellect? Music is said to affect the intellect of humans in several different ways. Specifically‚ it is said to affect infants more than any other age group. Music can improve learning skills‚ test taking skills‚ concentration‚ heartbeat‚ and relaxation. Music has been proven to offer several benefits for infants‚ young children‚ young adults‚ as well as for adults. With all of this in mind‚ how can one connect
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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 developed cell wall‚ which gives the rectangular
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