Life Cycles | Project Based Learning
Students work in small groups to build and present a simple physical model that shows one stage of a life cycle and explains the physics involved in motion, growth, or energy transfer. The lesson connects basic physics ideas to biological life cycles in an accessible, low-stakes project format.
| Term | Definition |
|---|---|
| Life cycle | The series of stages an organism goes through during its life. |
| Stage | One step or phase in a process. |
| Force | A push or pull that can change motion. |
| Motion | An object’s change in position over time. |
| Energy | The ability to do work or cause change. |
| Model | A simplified representation of an idea, object, or process. |
Introduce the project: each group will choose one life cycle stage and create a simple physical model that demonstrates the stage and one related physics idea. Show a quick example using a sketch or object.
Listen, ask questions, and form groups of 3-4.
Review the vocabulary and give a few examples, such as a seed sprouting, a butterfly flying, or a frog jumping. Emphasize that the physics explanation should be simple and correct.
Brainstorm a life cycle stage and discuss which physics concept best fits it.
Circulate and help groups choose a manageable stage and decide on materials. Keep expectations small and practical.
Sketch a plan, assign roles, and list what their model will show.
Monitor progress, ask guiding questions, and support groups that need help simplifying their idea.
Create the model, write 2-3 key facts, and prepare a 1-minute explanation.
Invite each group to present briefly. Ask one follow-up question per group to check understanding.
Present the model and explain the life cycle stage plus one physics concept.
Summarize how physics can be used to describe movement, change, and energy in living systems.
Reflect on one thing they learned and one question they still have.
End with a short class discussion on how models help scientists explain processes that are hard to see directly, including both biological change and physical behavior.
Formative assessment will be based on group participation, the accuracy of the life cycle stage, the correctness of the physics connection, and the clarity of the presentation. Use a simple rubric with four criteria: content accuracy, use of vocabulary, completeness of the model, and teamwork.
Write a one-paragraph reflection describing a different life cycle stage from class and identify one physics idea that could help explain it. Students should use at least two vocabulary words.