Investigate the effect of antiseptics or antibiotics on bacterial growth using agar plates and measuring zones of inhibition.
Investigate the effect of a range of concentrations of salt or sugar solutions on the mass of plant tissue.
Use qualitative reagents to test for a range of carbohydrates, lipids and proteins. To include: Benedict’s test for sugars, iodine test for starch and Biuret reagent for protein.
Investigate the effect of pH on the rate of reaction of amylase enzyme
Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed.
Plan and carry out an investigation into the effect of a factor on human reaction time.
Plan and carry out an investigation into the effect of a factor on human reaction time.
Measure the population size of a common species in a habitat. Use sampling techniques to investigate the effect of a factor on the distribution of this species.
Investigate the effect of temperature on the rate of decay of fresh milk by measuring pH change.
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