Oklahoma Science EN.LS4.6

ScienceGrades 9–12Biological Unity and Diversity

The Standard

Use evidence to construct an explanation that describes how a designed solution mitigates adverse impacts of human activity on biodiversity.*

Oklahoma Academic Standards for Science (2026)

Teacher's field guide

What Students Need to Do: Students identify a human activity that harms biodiversity and explain how a designed fix reduces that harm. They use data about both the harm and the living things affected.
What Mastery Looks Like: A student can trace farm runoff to algal growth, low oxygen, and fewer stream species. They can explain how a planted buffer limits runoff, cite nitrate and species counts, and flag rainfall as another possible cause.
Common Misconceptions: Students may treat lower nitrate as proof that more species live in the stream without checking species counts. They may mistake more fish for more kinds of fish, or ignore changes in rainfall.
How to Assess It: Exit ticket: A streamside buffer was planted beside a farm. Nitrate fell from 8 to 3 mg/L, and sampled aquatic species rose from 3 to 7; explain how the buffer might help and name one other factor to check.

Lesson moves

Pour equal cups of water over a sod tray and a bare-soil tray, then compare runoff volume and cloudiness in clear jars.
Post the exit-ticket nitrate and species counts; ask, “What supports the buffer claim, and what else might explain the change?”
Give pairs four data cards, nitrate, aquatic species counts, rainfall, and water color; have them select evidence for a buffer claim.
On a local watershed map, mark farm fields beside streams and choose where a planted buffer could reduce runoff.

Free download

A ready-to-print activity worksheet aligned to EN.LS4.6, with an answer key for the teacher on its own page. No account needed.

PDF, US Letter, prints cleanly in black and white.

Keep exploring

Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.