Osmosis Lab: Potatoes and Elodea Background Information: Cells have a need to regulate their internal environment. They need to be able to this because cells often find themselves in environments where the concentration of dissolved solids outside the cell is different from the number of dissolved solids inside the cell. Since the solids can not move across the membrane‚ the cell responds by moving water either into or out of the cell in an attempt to balance the number dissolved particles.
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Baseline data: Name: Zara Azmat Age: 16 Height: 5ft Weight: 45kg Resting Heart Rate: Target Zone: 60%-80% (122-163) PARQ completion: Yes Health issues: None Sport: Swimming I am hoping to improve 3 main components of fitness in order to enhance my performance in my chosen sport: Muscular endurance- by improving this component of fitness‚ it will allow my legs to work for longer periods of time whilst swimming due to the fact that the endurance capability of my legs had increased over my
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Jessica Jemma Coster Candidate Number: 2050 Centre Number: 36325 How does Charles Dickens create mystery and tension in the opening of Great Expectations? Charles Dickens‚ the author of ‘Great Expectations’ uses many different ways and methods of building up tension and mystery in the setting. He uses a variety of techniques to give the graveyard‚ the marshes and Miss Havisham’s house mysterious feelings with a sense of darkness and Gothic horror. Dickens uses a semantic field to bring the
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How does Steinbeck present the relationship between George and Lennie? The novella is set in the 1930s which was the time of the Great Depression (this is a time when there was severe economic downfall due to the Wall Street Crash). This means that it was very uncommon to sustain a friendship as migrant workers never trusted each other and life was a great struggle‚ but there are two characters that do have a friendship and it is shown all over the book. We are first introduced to the characters
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biology sbi4uo-a | Osmosis and Diffusion Lab | By: Elora Hobbin | | Group Members : Ashley Riley-Roy and Adam Reynolds | 9/11/2012 | | Introduction: Osmosis and diffusion are two procedures that are critical for cell survival. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. Osmosis is the movement of water molecules across a cell’s membrane. These two procedures help a cell to survive because they help maintain homestasis
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Biology laboratory work: Osmosis observation Measuring the dependence of net mass gain in potato pieces on concentration of sugar solution By Jonas Kulikauskas Siauliai Didzdvaris Gymnasium Hypothesis: The more sugar in solution‚ the more potato mass will decrease. Aim: To see how potato mass will change at different concentration solution. Research question: How the mass of potato will change at different concentration solutions? Variables: Dependent: solution concentration. Independent:
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Osmosis Lab Introduction: In order for cells to interact with their environment‚ molecules must be able to move through the cell membrane. Movement within the cell occurs by diffusion. Molecules move through the cell membrane by osmosis. Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. This happens because of random molecular motion. Molecules move around randomly until there is an even mixture throughout cell and mixture. The overall
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Experiment 1 Background Diffusion is a process‚ in relation to the spontaneous movement of molecules from an area of high concentration‚ to an area of low concentration down a concentration gradient. It is a type of passive transport method‚ that requires no cellular energy (ATP). This movement occurs‚ until a state of equilibrium has been established on both sides of the membrane. The diffusion of molecules happens at cellular level‚ through a cell membrane via the pores. The cell membrane
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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 in weight using the following formulae: Average change in weight/weight at
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According to the results‚ there was no significant difference between the filtered 100% water composition‚ and the filtered 90% water 10% soap composition. However‚ based on fFigure 2‚ the Average of Absorbance graph‚ showed that growth of the algae for the 100% water composition was observed to be slightly higher than the 90% water 10% soap composition. Meaning the soap may have slightly affected the growth of the algae‚ in some way. One possible‚ reason for a slightly higher growth for the filtered
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