IB skill practice

Find the rate of transpiration from a graph

Read two points off a water-lost vs time graph and find the transpiration rate as water lost over time (the gradient).

Paper 1, Paper 2 1 marks Difficulty 2

Find the rate of transpiration

The graph shows water lost from a plant by transpiration at a constant rate. Read the two marked points, then find the transpiration rate in cm³ per minute (cm³/min).