Required practical Investigation into the effect of a factor on the rate of dehydrogenase activity in extracts of chloroplasts Apparatus and a. Use appropriate apparatus to record a range of quantitative measurements techniques covered b. Use appropriate instrumentation to record quantitative (Not full statements) measurements, such as colorimeter c. Use laboratory glassware apparatus for a variety of experimental techniques Indicative apparatus Spinach leaves, blender, ice, isolation medium, DCPIP, beakers, test tubes, lamp, aluminium foil, timer, colorimeter, cuvettes. Amount of choice Increasing independence Least choice Some choice Many choices Full investigation Teacher Teacher allows Teacher allows a Student decides on a chooses the a limited choice of factors question. factor to be choice of to be varied and Student researches varied. Students factors to be methods of methods for carrying out vary the factor varied. measuring the experiment then and measure Students vary hydrogenase chooses equipment, hydrogenase the factor and activity. materials, justifying all activity measure Students have a choices. DCPIP colour hydrogenase number of change. activity experimental Experiments DCPIP colour procedures to fully specified in change. choose from, terms of Experiment and then follow equipment and probably fully that procedure. method. specified by teacher. Opportunities for observation and assessment of competencies Follow Students Students follow Students follow a Students follow written follow written a method they method they have written method. procedures method. have chosen. researched. Applies investigative Students must choose approaches an appropriate Students must Students must Students must and approach, equipment correctly use the correctly use correctly use the methods and techniques and appropriate the appropriate appropriate when using identify correct variables equipment. equipment. equipment. instruments for measurement and and control. equipment Safely uses a range of Students Students must Students must Students must carry out practical minimise risks safely use the safely use the a full risk assessment equipment with minimal equipment. equipment. and minimise risks. and prompting. materials
Required practical Investigation into the effect of a factor on the rate of dehydrogenase activity in extracts of chloroplasts Apparatus and techniques covered (Not full statements) a. Use appropriate apparatus to record a range of quantitative measurements b. Use appropriate instrumentation to record quantitative measurements, such as colorimeter c. Use laboratory glassware apparatus for a variety of experimental techniques Indicative apparatus Spinach leaves, blender, ice, isolation medium, DCPIP, beakers, test tubes, lamp, aluminium foil, timer, colorimeter, cuvettes. Amount of choice Increasing independence Least choice Some choice Many choices Full investigation Teacher chooses the factor to be varied. Students vary the factor and measure hydrogenase activity DCPIP colour change. Experiments fully specified in terms of equipment and method. Teacher allows a limited choice of factors to be varied. Students vary the factor and measure hydrogenase activity DCPIP colour change. Experiment probably fully specified by teacher. Teacher allows a choice of factors to be varied and methods of measuring hydrogenase activity. Students have a number of experimental procedures to choose from, and then follow that procedure. Student decides on a question. Student researches methods for carrying out the experiment then chooses equipment, materials, justifying all choices. Opportunities for observation and assessment of competencies Follow written procedures Students follow written method. Students follow written method. Students follow a method they have chosen. Students follow a method they have researched. Applies investigative approaches and methods when using instruments and equipment Students must correctly use the appropriate equipment. Students must correctly use the appropriate equipment. Students must correctly use the appropriate equipment. Students must choose an appropriate approach, equipment and techniques and identify correct variables for measurement and control. Safely uses a range of practical equipment and materials Students must safely use the equipment. Students must safely use the equipment. Students minimise risks with minimal prompting. Students must carry out a full risk assessment and minimise risks.
aqa-practical-hand-book-requirements.docx