Science9-12+
Biomass and Energy Flow in Ecosystems
By Dashia S.
A guided-practice packet for 9th-grade biology that explains biomass as stored energy and shows how it moves through trophic levels in an ecosystem. It builds vocabulary (biomass, trophic level, the 10% rule) and reasoning about energy transfer, aligned to NC DPI BIO.4.2, and includes key-term callouts and step-by-step practice.
Customize for your classroom
Teacher Guide & Tips
- Use as a 45 to 60 minute guided lesson: read the key-terms callout together first, then work through the energy-flow passage with students in pairs before independent practice.
- Discussion question: Why does only about 10% of energy pass to the next trophic level, and where does the rest go?
- Scaffold for struggling readers: have them sketch a simple food chain (grass to rabbit to fox) and label the energy and biomass at each level before reading the full passage.
- Extension for advanced students: ask them to predict how biomass pyramids and energy pyramids might differ in a system with many producers versus one with few.
- Estimated time: about 15 minutes for vocabulary and reading, 20 to 30 minutes for practice questions, and 10 minutes for a closing discussion.
Science9-12+
Biomass and Energy Flow in Ecosystems
By Dashia S.
A guided-practice packet for 9th-grade biology that explains biomass as stored energy and shows how it moves through trophic levels in an ecosystem. It builds vocabulary (biomass, trophic level, the 10% rule) and reasoning about energy transfer, aligned to NC DPI BIO.4.2, and includes key-term callouts and step-by-step practice.
Customize for your classroom
Teacher Guide & Tips
- Use as a 45 to 60 minute guided lesson: read the key-terms callout together first, then work through the energy-flow passage with students in pairs before independent practice.
- Discussion question: Why does only about 10% of energy pass to the next trophic level, and where does the rest go?
- Scaffold for struggling readers: have them sketch a simple food chain (grass to rabbit to fox) and label the energy and biomass at each level before reading the full passage.
- Extension for advanced students: ask them to predict how biomass pyramids and energy pyramids might differ in a system with many producers versus one with few.
- Estimated time: about 15 minutes for vocabulary and reading, 20 to 30 minutes for practice questions, and 10 minutes for a closing discussion.