Unit 08 · Humans & the Ocean
The year closes where science meets stewardship: the human footprint on the sea. This unit covers how we take from the ocean — fisheries, overfishing, and what a sustainable catch really means — and what we put back into it: plastics, nutrient runoff and the dead zones it feeds, and oil. It follows a warming, acidifying ocean and the coral bleaching that comes with it, and it weighs the tools of conservation, from marine protected areas to habitat restoration and policy. Mastery means you can take a human pressure on the ocean, follow it through the data, and judge what a real response would take.
| Criterion | Not yet | Approaching | Mastered |
|---|---|---|---|
| Fisheries & overfishing | Assumes the ocean’s fish are limitless. | Knows overfishing is a problem but not how a stock collapses. | Explains sustainable yield, how overfishing and bycatch drive a stock toward collapse, and why a fishery can crash even while boats keep fishing. |
| Pollution | Thinks pollution is just litter on the beach. | Names plastic or runoff but not its path or its effect. | Traces the main marine pollutants — plastics that break into microplastics, nutrient runoff that fuels dead zones, and oil — from source to ecological harm. |
| Climate change & ocean acidification | Sees a warming ocean as no different from a warmer day. | Names warming or acidification but cannot connect the chemistry. | Explains ocean warming and coral bleaching, and how absorbed carbon dioxide lowers seawater pH and starves shell-builders of carbonate — real seawater chemistry, tied to living reefs. |
| Conservation | Believes nothing can be done once the damage is underway. | Names a marine protected area but not what makes one work. | Weighs the tools of marine conservation — protected areas, habitat restoration, and policy — and judges when each fits the pressure it targets. |
| Lab technique (data case study) | Reads a headline instead of the data. | Reads the dataset but draws conclusions it does not support. | Works a fisheries-and-conservation data case study cleanly — reading catch or population data, quantifying the trend, and defending a conclusion the numbers support. |
| Integration (cross-domain) | Treats the science as isolated facts; makes no cross-domain connection. | Names a link to history, reading, or writing but cannot defend why it matters. | Connects the unit to its anchor across History · Reading · Writing (plus chosen electives) and defends why the connection matters. |
“The catch data climbed for years, then crashed — classic overfishing, because they kept fishing past the sustainable yield. Meanwhile the reef is bleaching: the water is warmer and more acidic, since the carbon dioxide it absorbs lowers the pH and leaves less carbonate for corals to build with. A marine protected area could let the stock rebuild.”
“There are always more fish in the sea. Acidification is… acid rain? A protected area just means you can’t go there, I guess.”
You demonstrate this unit through the fisheries-and-conservation data case study plus short oral checks where you reason from the numbers aloud — not a multiple-choice test. A criterion counts as mastered only when you can both work the data and explain the human-and-ocean science behind it. Mastery is demonstrated, not awarded.
A 5-page clipboard packet — unit overview, key terms, the mastery rubric, anchor examples, and a score sheet you can print and grade against.