Cambridge Secondary (7-9). Stage 9. Science. Learner's Book - Unit 4: Maintaining life - Question 13

Now think about how you could modify the experiment that you did with the stalk, to test your hypothesis. Discuss your ideas with a partner. In the original experiment, a freshly cut celery stalk stands in 1–2 cm of coloured water and the dye is observed as it moves up the stalk.