This activity explores images of a sea slug and chloroplasts, which serve as phenomena for learning about photosynthesis.
The sea slug Elysia crispata feeds on green algae and can survive for more than a month without eating. This is because the slug stores and uses the algae’s chloroplasts, which capture energy from sunlight and convert it to chemical energy through photosynthesis. These images include a photograph of an E. crispata sea slug and a micrograph of liverwort (Marchantia polymorpha) plant cells packed with chloroplasts (colored yellow).
The “Educator Materials” document includes background information and implementation suggestions for using the images as phenomena. The “Student Handout” includes the images and background information.
“Slug Power/Sea Slug” image by Patrick J. Krug, Cal State University
“Solar Fix/Chloroplast” image by Fernan Federici, Universidad Católica de Chile
Student Learning Targets
- Examine images of phenomena, make observations, and ask questions.
- Collaborate with peers on ideas, ask questions that require higher levels of reasoning, and develop deeper understanding of concepts.
- Describe the process of photosynthesis.
algae, chloroplast, endosymbiosis, energy, kleptoplasty, marine biology, photosynthesis, plant
Accessibility Level (WCAG compliance)
AP Biology (2019)
ENE-1.I, ENE-1.J, SYI-1.D, SYI-1.F; SP3
IB Biology (2016)
2.9, 4.2, 8.3
IB Environmental Systems and Societies (2017)
Common Core (2010)
Vision and Change (2009)