NGSS
MS-LS2-3
3 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Grade 7 Science · Chapter 4 · Lesson 1
Producers, Consumers, and Decomposers
Three jobs, and the third one closes the loop.
Grade 7 Science · Chapter 4 · Lesson 2
Real ecosystems are not chains.
Grade 7 Science · Chapter 4 · Lesson 4
Cycling Matter Through an Ecosystem
The atoms come back. The energy does not.