Forecast Paper 3 2013

SET	Q1	Q2
1	To analyse data on water pollution , such as Oxygen Demand (BOD) value and content to heavy metals in some rivers,and make an inference on the sources of pollution.	Conduct an experiment to determine the vitamin C content in various fruit juices
2	The effect of a vigorous exercise on  the rate of respiration and heart  beat.	Design an experiment to study the effects of macronutrient deficiency in plants,
3	Correlate different sizes of cubes to total surface area / volume (TSA/V) ratio and its effect on rate of diffusion.	Conduct a field study or use an appropriate anology to estimate the population size of animals such as garden snail and wood lice (Catch mark release recapture)
4	The effect of isotonic, hypotonic and hypertonic solutions on plant / animal cells	Effect of carbon dioxide concentration or temperature on the rate of photosynthesis of Hydrilla/Elodea
5	To study the growth of a plant, e.g. onion, maize, or balsam / intraspecific competition	Design experiment to investigate variation in humans and present the data graphically