Grade 5 · 4 lessons and a review

Food chains, matter, and model boundaries

Trace energy and matter while recognizing the limits of a food-chain diagram.

Before you begin

Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.

Lesson 1 of 4

Explain where food-chain energy begins and distinguish energy flow from recycling.

Lesson 2 of 4

Distinguish a matter-cycle arrow from an energy-transfer arrow.

Lesson 3 of 4

Calculate energy available at successive steps of a model.

Lesson 4 of 4

Use a food web to make a bounded claim about food availability.

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.

Guest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.