How Plant Parts Work

Activities to try

1. 1

   Plant test-lab: switch each part on or off and watch what happens

   Why it works: Each plant part has a specific job, and you can gather evidence for it by seeing what fails when the part is removed, deprived, or blocked — function becomes an observed cause-and-effect rather than a stated fact.

   1. Start with a healthy plant and predict what each part does before testing it.
   2. In the on-screen model, remove or disable the roots and observe the result (the model plant droops because it can no longer take in water); restore them and watch it recover. A real plant pulled up and left without water wilts, and its roots cannot simply be put back.
   3. Stand the plant in blue-dyed water and watch the colour travel up the stem and spread into the leaf veins and petals — evidence that the stem carries water from roots to leaves.
   4. Cover the leaves from the light while the plant still has water, and compare it with an identical, equally watered plant left in the light: over time (days to weeks for a real plant) the covered plant becomes pale and weak while the lit plant stays healthy — evidence that the leaves need sunlight to make the plant's food, and that the roots are not pulling ready-made food from the soil.
   5. After each test, state which job it gave evidence for: absorbing water (roots), carrying water (stem), making food using light (leaves). Notice that none of these tests shows anchoring, support or the flower's job of making seeds; talk about those jobs separately, using other evidence.
2. 2

   Tap-each-part diagram: the job behind every structure

   Why it works: Every named part of the plant maps to a specific function — structure and function go together.

   1. Tap each part of a labelled plant diagram to reveal a short animation of its job: roots drawing in water, water rising in the stem, sunlight hitting the leaf to make food, the flower forming seeds.
   2. Read or say the one-line function for each part as it is revealed.
   3. Link each part back to its name from earlier work on naming plant parts, then annotate a labelled diagram with each part's job in your own words.
3. 3

   Match and check: part to job

   Why it works: Confirm the structure–function mapping and explicitly reject the idea that roots or soil supply ready-made food.

   1. Match each part to its job: roots → absorb water and minerals and anchor; stem → transport water and support; leaves → make food using sunlight; flowers → make seeds.
   2. Answer targeted questions such as 'Which part makes the plant's food?' and 'What do the roots take in?', deliberately rejecting the option that says roots make or suck up food.
   3. Explain the reason for each match, not just the pairing.