AQA Combined: “Trilogy” Biology 1 2 3 4 5 Chemistry 6 7 8 9 10 Physics 11 12 13 14 15 16 Investigate the effect of salt or sugar solutions on plant tissue. Investigate the effect of a factor on the rate of an enzyme controlled reaction. Investigate the effect of a factor on the rate of photosynthesis. Investigate the effect of a factor on human reaction time. Investigate the population size of a common species in a habitat. Preparation of a pure, dry sample of a soluble salt from an insoluble oxide or carbonate. Investigate what happens when aqueous solutions are electrolysed using inert electrodes. Investigate how changes in concentration affect the rates of reactions by methods involving the production of a gas or a colour change. Students could carry out a full investigation here. Investigate how paper chromatography can be used to separate and tell the difference between coloured solutions. Students should calculate Rf values. Distillation of salt solution to obtain water. Investigate the relationship between force and extension for a spring. Investigate the effect of varying the force and /or mass on the acceleration of an object. Investigate the specific heat capacity of one or more materials. The investigation will involve linking the decrease of one energy store (or work done) to the increase in temperature and subsequent increase in thermal energy stored. Investigate, using circuit diagrams to set up a circuit, the factor(s) that affect the resistance of an electrical component. Investigate, using circuit diagrams to construct circuits, the V-I characteristics of a filament lamp, a diode and a resistor at constant temperature. Investigate, using appropriate apparatus, the densities of regular and irregular solid objects and liquids, making and recording appropriate measurements. OCR Combined: 21st Century Science B (9-1) Biology 1 2 3 4 5 Chemistry 6 7 8 9 10 Physics 11 12 13 14 15 16 Microscopy Sampling techniques Rates of enzyme controlled reactions Photosynthesis Microbiological techniques Electrolysis Distillation Separation techniques Production of salts Measuring rates of reaction Materials Forces Motion Waves Energy Circuits More detail at www.ocr.org.uk