Unit 03 · Cellular Energetics — printable rubric packet

Bright Minds Biology · Course Pack

Cellular Energetics — Unit Packet

Overview

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This packet is everything a parent or guide needs to assess Unit 03 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 an energetics lab and tracing where energy and carbon actually go.

Unit learning targets

By the end of the Cellular Energetics unit, a student should be able to:

Trace the light reactions and the Calvin cycle and say where each occurs.
Track glucose through glycolysis, the Krebs cycle, and the electron transport chain.
Explain how ATP hydrolysis powers reactions that would not happen on their own.
Connect photosynthesis and respiration as one carbon-and-energy cycle across organisms.
Run a respiration or photosynthesis investigation and explain the data.

How this unit is assessed

Mastery rubric

Six criteria, each judged Not yet / Approaching / Mastered (Page 3).

Energetics lab

A respiration or photosynthesis investigation — data collected live.

Oral check

The student traces energy and carbon in their own words (Page 4).

Lab notebook

Data table, graph, and interpretation kept distinct from raw observation.

How to read a Bright Minds rubric

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 technique and justify the 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.

Cellular Energetics · Vocabulary

Key Terms — What Counts as Correct

Vocabulary

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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
Photosynthesis
Light reactions	light-dependent reactions	Occur in the thylakoid membrane; make ATP and NADPH
Calvin cycle	light-independent; carbon fixation	Occurs in the stroma; not “the dark reactions” (runs in light too)
Chlorophyll	green pigment	Absorbs light; not itself the site (that’s the chloroplast)
Cellular respiration
Glycolysis	glucose splitting	In the cytoplasm; anaerobic start, before the mitochondrion
Krebs cycle	citric acid cycle; TCA	In the mitochondrial matrix
Electron transport chain	ETC; oxidative phosphorylation	Inner mitochondrial membrane; makes most of the ATP
Cellular respiration	aerobic respiration	Not breathing — it is a chemical process in the cell
Energy currency
ATP	adenosine triphosphate; energy currency	Energy released when the third phosphate is removed (ATP→ADP)
NADPH / NADH	electron carriers	Shuttle electrons; not the final energy the cell spends

Cellular Energetics · Mastery Rubric

Six Criteria — Not yet / Approaching / Mastered

Rubric

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Criterion	Not yet	Approaching	Mastered
Photosynthesis process	Cannot state inputs or outputs.	Knows reactants/products; vague on light vs Calvin stages.	Traces light reactions and Calvin cycle and where each occurs.
Cellular respiration process	Confuses respiration with breathing.	Lists stages but misplaces inputs or location.	Tracks glucose through glycolysis, Krebs, and the ETC.
Energy coupling / ATP	Unclear what ATP does.	Names ATP as energy but not how it is spent or made.	Explains ATP hydrolysis powering otherwise unfavorable reactions.
Connecting energetics to ecology / carbon	Sees the reactions in isolation.	Notes photosynthesis and respiration are linked.	Connects the two as a carbon and energy cycle across organisms.
Lab investigation	Cannot set up or read the investigation.	Collects data but interprets it loosely.	Runs a respiration or photosynthesis lab and explains the data.
Integration (cross-domain)	Treats the science as isolated facts.	Names a link to history, reading, or writing but cannot defend it.	Connects the unit across History · Reading · Writing and defends why it matters.

What “Mastered” requires

The student both runs the investigation and traces energy and carbon through the pathways, in their own words, unprompted.

What does not pass

Reciting “glycolysis, Krebs, ETC” in order with no idea where each happens or what it makes is Approaching. Collecting data but not explaining it is Approaching.

Grading it at home

The split between Approaching and Mastered is location and product: not just naming the stages, but where each runs and what comes out. Ask “where does that happen, and what does it make?” for each step.

Cellular Energetics · Calibration

Anchor Exemplars — To Calibrate Your Ear

Anchors

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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.

Tracing the pathways

▶ Mastered

“Glycolysis splits glucose in the cytoplasm for a little ATP, then the Krebs cycle in the matrix loads up electron carriers, and the ETC on the inner membrane cashes them in for most of the ATP — oxygen is what catches the electrons at the end.”

▶ Not yet

“Respiration is breathing, and it makes energy somehow.” (Confuses the process with breathing; no stages or sites.)

Photosynthesis & the carbon cycle

▶ Mastered

“The carbon a plant fixes in the Calvin cycle is the same carbon an animal breaks down in respiration — one organism’s output is another’s input. It’s one big cycle, and it scales up to the whole planet’s carbon budget.”

▶ Not yet

“Plants do photosynthesis and animals do respiration.” (True but separate — no link between them.)

Edge cases — coach, don’t fail

▶ “Dark reactions” slip

Calls the Calvin cycle the “dark reactions” and thinks it only runs at night. Coach: it doesn’t need light directly, but it needs the ATP/NADPH the light made — so it runs in daylight too.

▶ Data without meaning

Clean data table, no interpretation. Coach the “so what?” — what does the CO₂ or O₂ change tell you about the rate? Not yet on the lab criterion until they read their own data.

Cellular Energetics · Score Sheet

Unit Score Sheet — One per student

Score Sheet

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Student: ______________________________________ Date: _______________ Guide: _________________________

Mastery criteria — circle one per row

#	Criterion	Decision
1	Photosynthesis process	NY / Appr / Mast
2	Cellular respiration process	NY / Appr / Mast
3	Energy coupling / ATP	NY / Appr / Mast
4	Connecting energetics to ecology / carbon	NY / Appr / Mast
5	Lab investigation	NY / Appr / Mast
6	Integration (cross-domain)	NY / Appr / Mast

Energetics lab — technique check

Setup correct — respirometer / photosynthesis rig assembled and sealed as designed.
Control included — a comparison that isolates the variable being tested.
Data recorded at set intervals; units and time noted.
Graph drawn and the trend described (rate up, down, plateau).
Notebook keeps raw data separate from the interpretation.

Token used this session?

☐ 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.