Biology-B1-Osmosis (RP) 0.0 / 5 ? BiologyExchange of materialsGCSEAQA Created by: tonisha_Created on: 08-05-22 18:52 What is osmosis? the movement of water molecules from an area of high concentration to an area of low concentration across a partially permeable membrane 1 of 22 METHOD ----------- Firstly do what to the potato? peel it 2 of 22 Then use a what? cork borer 3 of 22 To produce potato what? cylinders 4 of 22 Around how many? 3-5 5 of 22 Why should you use a cork borer? this gives the potato the same diameter 6 of 22 Then use a? scalpel 7 of 22 To do what to the cylinders? trim them down to thee same length 8 of 22 Around what size? 3cm 9 of 22 Then measure the length of the cylinder using? a ruler 10 of 22 And measure the mass using? a balance 11 of 22 Then place each cylinder into a what? test tube 12 of 22 Filled with what? different concentrations of sugar solution 13 of 22 Make sure one of the test tubes is filled with what? distilled/pure water 14 of 22 Then leave? overnight 15 of 22 For osmosis? to take place 16 of 22 Then take them out? of the test tube 17 of 22 And do what to them? pat them dry with a paper towel 18 of 22 Why? to remove excess water 19 of 22 Then measure? the length and mass again 20 of 22 Then calculate? the percentage change 21 of 22 What is the formula for percentage change? change in value ------------------- x 100 original value 22 of 22
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