- Mark the plastic boxes with the numbers 1, 2 and 3.
- Weigh each box and enlist the results in the table below!
- Measure the height of the cress and enlist it in the table as well.
- Put the boxes of water cress at different places:
Box No. 1: No water / place it near a window facing south
Box No. 2: Keep wet / place it near a window facing south
Box No. 3: Keep wet / place it 24 h in the refrigerator.
Water Box 2 regularly!
After 24 hours weigh and measure the cress boxes once more and enlist the results in the table below.
Keep an eye on cress box No. 3 after you took it out of the ice box.