Osmosis and Water Potential Year 11 Emary Venter INTRODUCTION: The cell is the basic unit of living things‚ and is made up of multiple organelles. Organelles are membrane bound subdivisions‚ each specialised for a specific function. This experiment looks at the Plasma Membrane‚ which is a semipermeable layer surrounding the cell. It’s primary job is to control what goes in and out of the cell. Molecules can move across this membrane in either an active movement or a passive movement
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Studying Life Characteristics of Living Things What are some characteristics of living things? No single characteristic is enough to describe a living thing. Some nonliving things share one or more traits with living things. Living things share the following characteristics: made up of units called cells reproduce based on a universal genetic code grow and develop obtain and use materials and energy respond to their environment maintain a stable internal environment change over time
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Why Do Living Things Need Energy? All living things need energy to survive. Nearly all the energy for life comes from the sun. Autotrophs are organisms that make their own food. There are two laws of Thermodynamics: • First Law- The law of conservation of energy‚ which states that energy can be converted from one form to another‚ but it CANNOT be created or destroyed. • Second Law- States that energy cannot be converted without the loss of usable energy IMPORTANT TERMS Energy- the ability
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Osmosis is the net movement of water from a high concentration of water to a low concentration of water down a concentration gradient. This is done to equalise the solute concentrations on the two sides. Therefore‚ in other words‚ the movement of water is depended on the concentration of dissolved solute in the water (in this case the sucrose) and if there are a higher concentration of sucrose in the visking tubing‚ the water in the beaker will move into the visking tubing to make both solution balanced
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Experimental Laboratory Report: An investigation into the rate of osmosis Liana Gohery - 98332250 12/12/2014 Word count - ………3000……….. 1. Abstract This study was conducted to investigate the effect of concentration gradients on the rate of osmosis. Osmosis is the cellular transport of water‚ this study was conducted to show the significance of the rate at which this occurs. Dialysis bags were filled with three different concentrations of sucrose solutions and two with water. They were
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Diffusion‚ Osmosis‚ Active Transport There are two ways in which substances can enter or leave a cell: 1) Passive a) Simple Diffusion b) Facilitated Diffusion c) Osmosis (water only) 2) Active a) Molecules b) Particles Diffusion Diffusion is the net passive movement of particles (atoms‚ ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. It continues until the concentration of substances is uniform throughout. Some major examples of diffusion
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Diffusion of Ammonium hydroxide with red litmus paper Definition of diffusion 1. Diffusion is the process in which particles move from an area of high concentration to an area of low concentration in order to evenly spread out. 2 Diagram. 3. During the diffusion tube experiment I noted that firstly ammonium hydroxide was placed on to a piece of cotton wool. The cotton wool (with the ammonium hydroxide) was then placed in to a diffusion tube containing around 10 pieces of curled red
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It can be hard for a Muslim to live in a non Muslim country because of the beliefs of Islam and how they go about their certain religious commutes. Their religion can affect their lives in such a way that they have to follow five pillars of faith. These five pillars each have certain rules that the Muslims have to follow. Living in a non Muslim country can disrupt the following of these rules. The first pillar that the Muslims have to follow is the Shahada. This can also be known as creed. This
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Zodiac………………………………………………………. 3.3. Communication…………………………………………….. 3.4. Status of Women…………………………………………… 3.5. Power Distance…………………………………………….. 3.6. New Year Celebration……………………………………... 02 02 03 03 03 04 4.The Differences…………….………….………………………………………….04 4.1. Non-verbal communication……………………………….. 05…………………………Eye Contact 05…………………………Touching 05………………………....Hand Gesture 06………………………….Posture 4.2. Eating Habit……………………………………………...… 06………………………….Food and Belief 08………………………….The Use of Cutlery 08…………………………
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Osmosis is the movement of water from an area of high concentration to an area of low concentration across a semi permeable membrane. An osmotic system is established when a semi-permeable membrane is placed between two solutions. In this biological systems context‚ osmosis is the exchange of water between the potato cell and the surrounding medium of varying sucrose concentrated solutions‚ with the plasma membrane being the semi- permeable membrane. Because water molecules have kinetic energy‚ they
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