Ronald Wilson Pd:4th 11/16/12 Introduction In this experiment diffusion and osmosis is the main idea. When using diffusion and osmosis you are trying to separate different solute concentrations on either side of the membrane. Only a solute’s relative concentration‚ or water potential‚ affects the rate of osmosis. The higher the concentration of solutes‚ the faster water will flow through the membrane to equalize the concentration. The way we describe the movement from higher to lower concentration
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Elodea & Photosynthesis Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. Introduction This lab has been created in order to find what extent does distance from a light source (5cm‚ 10cm‚ and 15cm) affect the rate of photosynthesis (measured in bubbles / 3 min) in Elodea water plants. Hypothesis:
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Osmosis is the spontaneous net movement of solvent molecules through a partially permeable membrane into a region of higher solute concentration‚ in the direction that tends to equalize the solute concentrations on the two sides.[1][2][3] It may also be used to describe a physical process in which any solvent moves‚ without input of energy‚[4] across a semipermeable membrane (permeable to the solvent‚ but not the solute) separating two solutions of different concentrations.[5] Although osmosis does
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Conclusion The aim of this experiment was to investigate the effect of varying the distance (cm) of the Elodea plant from the light source at (5‚ 15‚ 25‚ 35 and 45 (cm)) (±0.05) on the photosynthetic rate by counting the number of oxygen bubbles rising up the test tube per minute (bubbles min^(-1)). The hypothesis was supported because as the light intensity increased‚ the rate at which oxygen bubbles rising to the top of the test tube also increased – for example‚ at the closest distance of 5
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Bella Nelson 11/25/12 Regents Biology 3BCD Osmosis and Plasmolysis Problem: What is the effect of Osmosis on a chicken egg? What is the effect of different solutions with various concentrations on plant cells? Hypothesis: 1. In an animal cell in a hypertonic solution the egg will swell‚ in a hypotonic solution the egg will swell. 2. In a plant cell in a hypertonic solution it will shrink‚ and in a hypotonic solution
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Biology 107 Section 1 11/4/13 Diffusion & Osmosis Introduction The purpose in this experiment was to estimate the osmolarity of potato tuber and celery cells by change of weight.Pieces of potato tuber and celery would be incubated in different sucrose solutions to find out the molarity at which weight of potato and celery tissues do not change. My hypothesis was that the Table 1: Group Data for Experiment:Estimating Osmolarity by Change in Weight Table
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cells go through a process called diffusion. Diffusion is the movement if molecules from an area of higher concentration to and area of lower concentration. This process with continue to occur until an equilibrium is reached. Osmosis is a different and unique kind of diffusion. Osmosis is the diffusion of water through a permeable membrane. The phrase “permeable membrane” means that the membrane will only allow specific molecules through such a water or oxygen. In Osmosis water will travel from an area
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Osmosis in Plants Outline: 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. Definition - Osmosis: Movement of a solvent (liquid) through a semi-permeable membrane separating solutions of different concentrations. The solvent passes from a less concentrated solution to a more concentrated solution until the two concentrations are equal. All
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Placement Biology ® AP Biology Lab 1 281 EDVO-Kit # Storage: Principles & Practice of Diffusion & Osmosis Store entire experiment at room temperature. EXPERIMENT OBJECTIVE The objective of this experiment is to develop an understanding of the molecular basis of diffusion and osmosis and its physiological importance. Students will analyze how solute size and concentration affect diffusion across semi-permeable membranes and how these processes affect water potential. Students will also
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http://thegrabup.com/?p=811 Significance Of Osmosis (700-1200) Osmosis is a process of movement of solvent through a semi permeable membrane from an area of high water concentration to an area of low water concentration to equalize the concentration of solute to both side of the membrane. . Water is sometimes called "the perfect solvent‚" and living tissue (for example‚ a human being’s cell walls) is the best example of a semipermeable membrane. Osmosis process as demonstrated below shows that when
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