Ocean Acidification Data Analysis and CER Activity — HS Biology Mini Bundle

Description

Ocean acidification is often taught as a vocabulary term — “the other CO2 problem” — and left there. This mini bundle treats it as an investigation instead. Students work through real trends in ocean chemistry, then have to explain what those trends mean in structured scientific writing.

The pairing is deliberate: data analysis first, CER writing second, so the claims students write are anchored in numbers they have already wrestled with.

What’s inside

• Ocean Acidification Data Analysis Worksheet — students take on the role of scientists analyzing trends in atmospheric carbon dioxide, ocean pH, and marine organism health through differentiated data analysis.
• Evidence-based CER writing — a Claim-Evidence-Reasoning component that has students convert their analysis into a supported scientific explanation.

How it runs in class

Run the worksheet as the investigation, then assign the CER writing as the follow-through — same period if your blocks allow, or as the next day’s task while the data is still fresh. Because the analysis is differentiated, students who need more support can still reach the writing task with genuine evidence in hand.

Standards alignment

NGSS: HS-LS2-6. Grades 8–12 · Biology, Environment, Marine Science.

The pairing also makes grading meaningful: the CER writing tells you whether the data analysis landed. A student can circle the right trend and still not be able to explain it — the writing exposes that gap while it’s still cheap to fix. Educators building an ocean chemistry thread through a climate unit will find this mini bundle is the natural first half, with the solutions bundle as the second.

Only need the investigation? The data analysis worksheet is available on its own. Ready to go further — from understanding acidification to evaluating solutions? The Ocean Acidification CER Bundle puts students in the role of environmental scientists weighing real mitigation strategies. Free starters are in the Free Library.