Difference between revisions of "GCSE Biology Required Practical: Osmosis in Plant Tissue"
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===Meaning=== | ===Meaning=== | ||
Investigate the effect of the [[concentration]] of [[sugar]] [[solution]] on the [[mass]] of [[plant]] [[tissue]]. | Investigate the effect of the [[concentration]] of [[sugar]] [[solution]] on the [[mass]] of [[plant]] [[tissue]]. | ||
| − | === | + | ===Experiment=== |
| + | ====Variables==== | ||
*[[Independent Variable]] - The concentration of [[sugar]] [[solution]]. | *[[Independent Variable]] - The concentration of [[sugar]] [[solution]]. | ||
*[[Dependent Variable]] - The [[mass]] of [[plant]] [[tissue]] at the end. | *[[Dependent Variable]] - The [[mass]] of [[plant]] [[tissue]] at the end. | ||
*[[Control Variable]]s - Volume of plant tissue. Surface area of plant tissue. Length of time the plant tissue is left in solution. Temperature of the solution. | *[[Control Variable]]s - Volume of plant tissue. Surface area of plant tissue. Length of time the plant tissue is left in solution. Temperature of the solution. | ||
| − | #Cut | + | ====Method==== |
| + | #Cut 6 equal volumes of plant tissue (potato). | ||
#Dry the plant tissue with paper towel and measure the mass of each piece, noting it down. | #Dry the plant tissue with paper towel and measure the mass of each piece, noting it down. | ||
#Use a [[Measuring Cylinder]] to measure 10cm<sup>3</sup> of 1.0M [[sugar]] [[solution]] and pour it into a [[Boiling Tube]]. | #Use a [[Measuring Cylinder]] to measure 10cm<sup>3</sup> of 1.0M [[sugar]] [[solution]] and pour it into a [[Boiling Tube]]. | ||
| − | #Repeat step 3 with | + | #Repeat step 3 with 8cm<sup>3</sup> of [[sugar]] [[solution]] and 2cm<sup>3</sup> of distilled water to give 0.8M [[sugar]] [[solution]], then 6cm<sup>3</sup> and 4cm<sup>3</sup> of distilled water to give 0.6M [[sugar]] [[solution]], repeating this pattern until there is 10cm<sup>3</sup> of 0.0M [[sugar]] [[solution]]. |
| − | #Place one piece of plant tissue into each of the | + | #Place one piece of plant tissue into each of the 6 [[Boiling Tube|boiling tubes]] leaving them for 12-24 hours (ensuring it is the same time for all). |
#Remove the pieces of plant tissue, drying them with a paper towel and measure their [[mass]]. | #Remove the pieces of plant tissue, drying them with a paper towel and measure their [[mass]]. | ||
#Plot a graph showing the concentration of [[sugar]] [[solution]] on the x-axis and the change in [[mass]] of plant tissue on the y-axis. | #Plot a graph showing the concentration of [[sugar]] [[solution]] on the x-axis and the change in [[mass]] of plant tissue on the y-axis. | ||
Revision as of 09:04, 11 April 2019
Key Stage 4
Meaning
Investigate the effect of the concentration of sugar solution on the mass of plant tissue.
Experiment
Variables
- Independent Variable - The concentration of sugar solution.
- Dependent Variable - The mass of plant tissue at the end.
- Control Variables - Volume of plant tissue. Surface area of plant tissue. Length of time the plant tissue is left in solution. Temperature of the solution.
Method
- Cut 6 equal volumes of plant tissue (potato).
- Dry the plant tissue with paper towel and measure the mass of each piece, noting it down.
- Use a Measuring Cylinder to measure 10cm3 of 1.0M sugar solution and pour it into a Boiling Tube.
- Repeat step 3 with 8cm3 of sugar solution and 2cm3 of distilled water to give 0.8M sugar solution, then 6cm3 and 4cm3 of distilled water to give 0.6M sugar solution, repeating this pattern until there is 10cm3 of 0.0M sugar solution.
- Place one piece of plant tissue into each of the 6 boiling tubes leaving them for 12-24 hours (ensuring it is the same time for all).
- Remove the pieces of plant tissue, drying them with a paper towel and measure their mass.
- Plot a graph showing the concentration of sugar solution on the x-axis and the change in mass of plant tissue on the y-axis.