Difference between revisions of "GCSE Biology Required Practical: Osmosis in Plant Tissue"
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#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 9cm<sup>3</sup> of [[sugar]] [[solution]] and 1cm<sup>3</sup> of distilled water to give 0.9M [[sugar solution]], then 8cm<sup>3</sup> and 2cm<sup>3</sup> of distilled water to give 0.8M [[sugar]] [[solution]], repeating this pattern until there is 10cm<sup>3</sup> of 0.0M [[sugar]] [[solution]]. | + | #Repeat step 3 with 9cm<sup>3</sup> of [[sugar]] [[solution]] and 1cm<sup>3</sup> of distilled water to give 0.9M [[sugar]] [[solution]], then 8cm<sup>3</sup> and 2cm<sup>3</sup> of distilled water to give 0.8M [[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 11 [[Boiling Tube|boiling tubes]] leaving them for 12-24 hours (ensuring it is the same time for all). | #Place one piece of plant tissue into each of the 11 [[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 19:28, 3 April 2019
Key Stage 4
Meaning
Investigate the effect of the concentration of sugar solution on the mass of plant tissue.
Method
- 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.
- Cut 11 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 9cm3 of sugar solution and 1cm3 of distilled water to give 0.9M sugar solution, then 8cm3 and 2cm3 of distilled water to give 0.8M sugar solution, repeating this pattern until there is 10cm3 of 0.0M sugar solution.
- Place one piece of plant tissue into each of the 11 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.