Aim
In this experiment, children test whether salt stops cress seeds from germinating and growing.
Time needed: 2 hours (1 week apart)
What you’ll need
You will need table salt, beakers, cress seeds, filter paper, trays, clingfilm, sharpies, pencils and rulers. A full kit and prep list can be downloaded here.
DAY 1 Method (full details can be downloaded here)
- Label 4 pieces of filter paper using a pencil (0, low, medium, high).
- Soak each piece of filter paper in the correct solution (0 salt, low salt, medium salt and high salt)
- Put the filter papers into a tray.
- Count 10 cress seeds onto each filter paper.
- Cover the tray tightly with clingfilm and sticky tape.
- Leave in the dark for 1 week!
DAY 2 Method (full details can be downloaded here)
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