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An Investigation into Osmosis.
Member rating: No Rating | Words: | Submitted: Wed Apr 07 2004
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Year 11 Biology Coursework: An Investigation into Osmosis Introduction In this investigation, I am trying to find the answer to these two key questions below: 1 What are the factors that determine whether water moves in or out of the potato? 2 How does the concentration of a solution surrounding a cell affect movement in and out of cell across its semi- permeable membrane? In order to do this I will need to consider what osmosis is and make some experiments to help me investigate and find answers for the key questions. Background Information Osmosis is diffusion of water molecules moving from a particularly permeable membrane from a high concentration to a lower concentration. The water molecules can pass both ways through the membrane in two- way traffic, but there is a steady net flow of water molecules into the lower concentration of water. In figure 1 is a diagram showing how osmosis takes place. Figure 1...
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