On Senior Science Careers Day, we thought it would be fun to let the students practice their systematic skills by taking part in a hands-on activity that we called “Supermarket Systematics”.
We bought multiple sets of twelve fruits and vegetables from a local supermarket.
The students’ task was to classify them into two plant families based on morphological characteristics. Students worked together in groups and used dissecting microscopes to compare seeds, fruits, and leaves of the fruits and vegetables.
They also had several photos that showed other parts of the plants such as flowers and habit, which provided further clues as to which plant family each fruit or vegetable belonged to.
We spent time talking with the groups and asking them questions about their observations.
Most groups did a great job as supermarket systematists! They were able to correctly classify ten of the items into two economically important plant families.
| Brassicaceae (mustard family) | Solanaceae (potato family) |
| cabbage | potato |
| Brussels sprouts | tomato |
| bok choy | aubergine |
| broccolini | capsicum |
| radish | tamarillo |
Some also correctly identified the two vegetables that did not belong to either family, which were kumara (sweet potato) and lettuce. Although kumara look very similar to potatoes, they are in a different family (Convolvulaceae) and the students confirmed this by looking at photos of other characteristics of each plant. In the same way, lettuce looks superficially similar to cabbage, but is in the daisy family (Asteraceae).
We hope the students had as much fun as we did doing the Supermarket Systematics activity, and learned a bit about plant systematics and research at Te Papa too!