IDENTIFY AND CONTROL: A group of Grade 10 learners wanted to investigate one of the factors that have an effect on the rate of transpiration in plants. They had to plan and design this investigation. Loo at apparatus they used and answer the questions: syringe Plastic bag-with water droplets on the inside twig with loaves rubber stopper waler glass flask markers air bubble capillary tuba water 3.2.1. Which environmental factor, that has an influence on the rate of transpiration, did the learners investigate? (1) 3.2.2. Identify each of the following for investigation in QUESTION 3.2.1: (a) Independent variable (b)Dependent variable. 3.2.3. Name THREE other environmental factors that could influence the validity of this investigation if not well controlled. (1) (1) (3) 3.2.4. Predict how the rate of transpiration for the three factors mentioned in QUESTION 3.2.3. compare to that of the experiment done in QUESTION 3.2. (2) (8) [20] TOTAL: 100 MARKS​
