lulu31271 lulu31271 19-04-2022 Biology contestada 06 Some students investigated the effect of drinking caffeine on reaction time. They used a drink containing 32. 25 mg of caffeine per 100 cm This is the method used. 1. Divide the students into four groups, A, B, C and D. 2. Measure and record the reaction time of each student using the ruler-drop test. 3. Students in: • group A drink 200 cm of water • group B drink 200 cm of the caffeine drink • group C drink 400 cm of the caffeine drink • group D drink 600 cm of the caffeine drink. 4. Repeat step 2 after 15 minutes. 0 6 1 Describe how to do the ruler-drop test. [3 marks]
