This packet is everything a parent or guide needs to assess Unit 07 at home — learning targets, the answers that count as correct, the mastery rubric, calibration examples, and a clipboard score sheet. No multiple-choice test: the student shows mastery by running a tide-pool or reef community survey with a quadrat and reading the food web behind it.
By the end of the Ocean Ecosystems unit, a student should be able to:
Six criteria, each judged Not yet / Approaching / Mastered (Page 3).
Sample a defined area with a quadrat; record species and abundance.
The student reasons from the quadrat data aloud (Page 4).
Quadrat placement, species counts, and diversity kept distinct.
You are making a decision, not adding up points. For each criterion, decide whether the work is Not yet, Approaching, or Mastered — the column language tells you which. A criterion counts as mastered only when the student can both run the survey and explain the food-web and symbiosis biology behind it. A student carries three tokens per term; one token buys a re-do of one criterion on another day, so a single bad afternoon never sinks the unit.
Accept any answer in the synonyms column — they are pre-approved as equivalent. The third column flags the confusions that look close but are not yet, so you can coach precisely.
| Canonical answer | Accepted synonyms | Common confusion / discriminator |
|---|---|---|
| Marine ecosystems | ||
| Coral reef | reef | Built by coral animals and their zooxanthellae; a biodiversity hotspot |
| Estuary | where a river meets the sea | Brackish nursery; salinity swings between fresh and salt |
| Hydrothermal vent | deep-sea vent | Seafloor hot spring; base of a sunless, chemosynthetic community |
| Marine snow | sinking organic detritus | Falling food that feeds much of the deep sea — not weather |
| Feeding & partnership | ||
| Food web | who-eats-whom network | A web, not one chain; energy is lost at each step up |
| Chemosynthesis | chemical-energy food-making | Microbes build food from chemicals, not sunlight — not photosynthesis |
| Symbiosis (mutualism) | close partnership | Both partners benefit — e.g. coral and its zooxanthellae |
| Quadrat | sampling frame | A defined area you sample so counts are comparable |
| Criterion | Not yet | Approaching | Mastered |
|---|---|---|---|
| Major ocean ecosystems | Pictures the ocean as one uniform habitat. | Names a reef or the deep sea but cannot say what defines it. | Distinguishes coral reefs, estuaries, kelp forests, the open ocean, and the deep sea by their conditions and the life they support. |
| Food webs & energy flow | Cannot trace who eats whom. | Draws a chain, not a web, and misses the energy lost each step. | Maps a marine food web from producers to apex predators and names chemosynthesis as the base of the web at vents. |
| Symbiosis & interactions | Treats every species as living alone. | Names symbiosis but cannot give a marine example. | Explains mutualism with real cases — coral and its zooxanthellae — and predicts what happens when it breaks down. |
| The deep sea (life without sunlight) | Believes the deep sea is lifeless. | Knows life exists deep but not how it survives without sunlight. | Explains that the deep sea teems with life running on chemosynthesis and marine snow, and names cold, dark, and pressure adaptations. |
| Lab technique (community survey) | Counts organisms with no method or defined area. | Uses a quadrat but places it carelessly or skips species. | Runs a clean tide-pool or reef survey with a quadrat — a defined area, a key, and recorded abundance and diversity. |
| 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 split between Approaching and Mastered is sampling discipline: a careful survey places the quadrat by a set rule and counts every species inside it. Ask to see the data sheet — a defined area and real counts, not a single “lots of stuff.”
Read these before you grade. They show what Mastered and Not yet actually sound like, plus the edge cases where you should coach rather than decide on the spot.
Student: ______________________________________ Date: _______________ Guide: _________________________
| # | Criterion | Decision | Notes |
|---|---|---|---|
| 1 | Major ocean ecosystems | NY / Appr / Mast | |
| 2 | Food webs & energy flow | NY / Appr / Mast | |
| 3 | Symbiosis & interactions | NY / Appr / Mast | |
| 4 | The deep sea (life without sunlight) | NY / Appr / Mast | |
| 5 | Lab technique (community survey) | NY / Appr / Mast | |
| 6 | Integration (cross-domain) | NY / Appr / Mast |
☐ No ☐ Yes — for criterion: __________ Tokens remaining: ☐ 3 ☐ 2 ☐ 1 ☐ 0
NY = Not yet · Appr = Approaching · Mast = Mastered · Unsure between two levels? Circle the lower one and note what a re-do would need.