NGSS
HS-LS2-2
4 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Environmental Science · Chapter 3 · Lesson 1
Counting species is not measuring diversity.
Environmental Science · Chapter 4 · Lesson 2
Carrying Capacity and Limiting Factors
A ceiling that moves, and can be lowered by hitting it.
Environmental Science · Chapter 4 · Lesson 3
A million eggs is a strategy, not extravagance.
Biology · Chapter 8 · Lesson 4
Two numbers decide almost everything.