KS2 Science Lesson Function of the Stem

Function of the Stem – KS2 Science Lesson (Celery Investigation, Transport & Support)

A complete KS2 Science lesson teaching pupils about the structure and function of the stem, including a hands-on celery experiment to observe how water travels through a plant. Suitable for Year 3–5 biology units.

This engaging lesson explores how stems support plants, transport water and nutrients, and store food. Pupils learn through clear explanations, retrieval practice, real examples, and a practical investigation that demonstrates stem function visibly and memorably.

What’s Included:

Fully editable lesson PowerPoint
Starter activity: recall all parts of a plant
Discussion prompts on trees vs plants (trunk vs stem)
Clear explanation of the stem’s roles
Instructions for a full Celery Stem Experiment
Prediction writing (“I believe…” sentence stems)
Fair test reminder (same size celery, same water, same dye)
WAGOLL example prediction
Equipment list and step-by-step method
Observation guidance
Results and explanation slides
Conclusion and evaluation prompts