Read the direction of a food web
Follow energy from a food source to its consumer.
Open lesson 1Food-web energy, cycling matter, and bounded predictions
Combine feeding relationships with quantitative energy models and distinguish matter cycling.
Before you begin
- Read food-to-consumer arrows; calculate percentages; write conditional claims.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Calculate a Model Transfer Efficiency
Find a supplied energy-transfer percentage without assuming a universal rate.
Open lesson 2Use a Carbon-Matter Arrow Key
Explain a simplified matter cycle alongside energy flow.
Open lesson 3Make a Conditional Web Prediction
Separate a plausible pathway effect from a guaranteed population count.
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.