DIFFUSION= The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. OSMOSIS= Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. SELECTIVE PERMEABLE MEMBRANE=a membrane (as a cell membrane) that allows
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Potato Cell Cytoplasm Composition PURPOSE: To determine the concentration of salt in the cytoplasm of potato cells HYPOTHESIS: Increase in salt concentration results in a hypotonic solution where the mass of the potato increases due to the movement of water into the cell. On the other hand‚ decrease in salt concentration results in a hypertonic solution where the mass of the potato decreases due to the movement of water outside the cell. MATERIALS: Potato Forceps Stopwatch Scalpel Test
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How is Osmosis Affected By the Concentration PLANNING Independent Variable The independent variable in this experiment is the thing that I will be changing in the experiment. This is the range of concentrations that have been obtained by diluting the original 1M solution of Sucrose. This is therefore the only thing that is going to be altered as I am investigating how different percentage of water molecules affects the weight of the the potato thus the rate and direction of osmosis. Dependant
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molecules in or out of their membrane. Some require no energy to do so (passive transport) while others require energy to be processed through (active transport). There is also the transportation of water across a membrane‚ which has its own term of osmosis. Too much of something can be taken in‚ or too little enters. This especially happens to plants‚ who require water (and sun) to live. Not enough water‚ as herbalists or any plant lover will know‚ will cause the plant to wilt. However‚ why consider
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| Stage 2 Biology | | Adelaide High School | [Osmosis Practical Report] Abstract: | The purpose of this investigation is to see if the concentration of Sodium chloride (NaCl) solution will affect the mass of the potato cylinder hence the rate of osmosis. This can be done by placing 5‚ identical in length (3cm) but different in weight‚ tubes of potato in 5 different beakers. Each containing an altered NaCl concentration. The concentrations used in this experiment were‚ 0%‚ 2%‚
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Assignment #1 Potatoes BPGM 244 Shawn Doucette Chris Tipoff January 28‚ 2009 Table of Contents Introduction 1 History of the Potato 2 The Potato Selection 3 Cooking the Potatoes 4 Conclusion 5 Bibliography 6 1. Introduction Potatoes are considered one of the most popular vegetables in Canada and the United States. The United States grows about 35 billion pounds of potatoes every year‚ which averages
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Lab Activity No. __ Diffusion and Osmosis I. Introduction Diffusion is the transfer of molecules (or ions) from an area of higher concentration to a lower concentration‚ while osmosis is the transfer of water from a higher concentration to a lower concentration. II. Objectives 1. Demonstrate diffusion and osmosis across membrane. 2. Examine the relation of membrane permeability to diffusion and osmosis. III. Materials 2 thistle tubes‚ 2 big beakers‚ 4 tube clamps to fit iron stands
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Senior Writing Seminar 13 December 2012 The Irish Potato Famine Six long years‚ with over 1 million dead‚ and nearly a quarter of the population missing‚ the Irish Potato Famine left a massive imprint in history (Irish 1). Most people underestimate the destruction of the Potato Famine because 1 million does not look like very many in today’s population numbers. Back in the 1800’s‚ less than 8 million populated Ireland. With
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1/2 cup broccoli‚ 1/2 cup carrots‚ turkey‚ and rice. Dinner-1 cup of water‚ 1/2 cup pretzels‚ 1 chicken breast‚ 1 sweet potato‚ and rice. Day 2 Breakfast-1 cup of milk‚ 2/4 bowl yogurt‚ 1 banana‚ 2 eggs‚ 1 bowl oatmeal. Lunch-1 cup of water‚ 1/2 cup grapes‚ 1/2 cup broccoli‚ 1/2 cup carrots‚ turkey‚ and rice. Dinner-1 cup of water‚ 1 rice cake‚ 1 chicken breast‚ 1 sweet potato‚ and rice. Day 3 Breakfast-1 cup of milk‚ 2/4 bowl yogurt‚ 1 banana‚ 2 eggs‚ 1 bowl oatmeal. Lunch-1 cup of water‚ 1/2 cup
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when most people still worked hard in the fields. Modern lifestyle and health consciousness did away with this item. Wiener Schnitzel Thin veal fillet‚ crumbed and fried. Served with chips and salad. Erbsensuppe Pea soup with onions and potato cubes. Cooked in a beef broth and
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