Topic 3 — Physical properties — blueprint for James

What I need from you: 3 decisions

Split "conductors and insulators" into heat and electricity, or keep one lesson?

MAT-013 sorts materials as thermal AND electrical conductors or insulators. Metals are both; wood and plastic are neither; but the two tests are different (a hot spoon handle; a bulb lighting in a circuit).

one lesson can teach "conducts heat" and "conducts electricity" as two tests on the same materials, which is what the atom asks. Two lessons would each be short.

Measure volume by reading a graduated cylinder, and stop there?

the register's "fixed-mass comparison" meant two objects with the same mass, asking which takes up more space. James read it as mass-to-volume proportionality and ruled that out.

Show the electricity test as one drawing and one sentence, since no lesson teaches circuits?

ENE-025 (Energy strand) covers thermal conductors; no MS Chemistry atom teaches a circuit.

L05 shows a battery, a bulb and two clips, and says in one sentence: "If the bulb lights, the material lets electricity through."

Topic 3 at a glance — 5 lessons

	Lesson	Opens on	Format
L01	What a physical property is	Two students describe a spoon.	article only
L02	Mass: how much material, in grams	A balance reads 250 g for an apple.	article only
L03	Volume: how much space, in milliliters	A student pours water into a tall thin glass and a short wide glass.	video + article
L04	Does it dissolve? Soluble and insoluble	A student stirs a spoonful of sugar into a glass of water.	video + article
L05	Conductors and insulators	A metal spoon and a wooden spoon stand in the same pan of hot soup.	video + article

What this topic is, in five lines

Five lessons, one per atom: MAT-005, 006, 007, 012, 013.

Terms coined here: physical property (L01), mass is retrieved from Topic 1 and given its unit and instrument (L02), volume (L03), soluble and insoluble (L04), conductor and insulator (L05).

Deliberately not taught: density (Topic 4), chemical properties (Topic 11), the particle reason for conduction (high school).

What a physical property is L01

Two students describe a spoon.

One says: it is shiny, it is hard, it is cold to touch, it is 15 cm long.

The other says: it is my favorite spoon, it was a present, it cost two dollars.

Which of those descriptions would still be true if a stranger found the spoon?

The point, stated first

Which facts about an object belong to the object itself?

A physical property is something you can observe or measure about a material without changing it into anything else.

Shiny, hard, cold, 15 cm long: you can check each one by looking or measuring.

Favorite, a present, two dollars: those are about the owner, not the spoon.

Video: nothing a page cannot show — article only.

Part 1 — MAT-005 — Sort a list of characteristics into physical properties and things that are not physical properties; coin physical property

Check: example sequence: property (hard) → property (shiny) → property (length 15 cm) → not a property (favorite) → not a property (price) → rule; fluency quiz: physical property or not, 8 quick cases (color, mass, price, where it was bought, whether it floats, its smell, its owner's name, its temperature)

Figure: table: the two columns — physical properties / not physical properties — the spoon's facts sorted

Leans on: T1 L01 (matter) — one recall question; MAT3-002 retrieved (sorting by a property)

Part 1q — Fluency quiz: physical property

Check: fluency

Figure: —

Leans on: —

Mass: how much material, in grams L02

A balance reads 250 g for an apple.

The same balance reads 250 g for a bag of feathers.

The bag of feathers is far bigger than the apple.

So does the bag of feathers have more mass?

The point, stated first

What does a balance actually measure?

Mass is the amount of material in something.

A balance measures mass, in grams (g) or kilograms (kg).

The apple and the feathers both read 250 g, so they have the same mass.

Size is a different property.

Video: nothing a page cannot show — article only.

Part 1 — MAT-006 — Identify which of two objects has greater mass given balance readings or a fixed-volume comparison

Check: fluency quiz: which has more mass, from two balance readings (6 quick pairs, readings in g and kg with a unit conversion never required); one item on two blocks of the same size, where the balance says which has more mass; misconception item: a student says the bigger bag must have more mass — the key corrects: the balance decides, not the size

Figure: SVG: two balances, the apple and the bag of feathers, both reading 250 g

Leans on: T1 L01 (the balance reads mass) — one recall question; MAT3-004 retrieved

Volume: how much space, in milliliters L03

A student pours water into a tall thin glass and a short wide glass.

The tall glass looks fuller.

She pours each into a measuring cylinder.

The tall glass held 180 mL; the wide glass held 240 mL.

Why did her eyes get it wrong?

The point, stated first

How do you compare how much space two things take up?

Volume is the amount of space something takes up.

Liquids are measured in a measuring cylinder, in milliliters (mL).

Read the level of the liquid against the scale.

The wide glass held more, 240 mL against 180 mL, whatever the shapes looked like.

Video: the liquid level settling on the scale as it is poured — video and article.

Part 1 — MAT-007 — Identify which of two objects has greater volume given a graduated cylinder reading; coin volume (the register's "fixed-mass comparison" dropped on James's ruling)

Check: scaffolded: worked read of a cylinder (the level, the nearest mark, the unit) → two typed readings in mL from drawn cylinders → fluency: which holds more, 6 pairs of readings

Figure: SVG: two measuring cylinders with the same scale, levels at 180 mL and 240 mL; a zoom on reading a level

Leans on: T1 L05 (a liquid keeps its volume) — one recall question; MAT3-005 retrieved

Part 1q — Fluency quiz: volume

Check: fluency

Figure: —

Leans on: —

Does it dissolve? Soluble and insoluble L04

A student stirs a spoonful of sugar into a glass of water.

The sugar disappears.

She stirs a spoonful of sand into a second glass of water.

The sand sits on the bottom however long she stirs.

Why do the two behave so differently?

The point, stated first

What decides whether a material disappears into water?

Sugar dissolves in water: it breaks into particles too small to see and spreads through the water.

A material that dissolves in water is called soluble.

Sand does not dissolve, however long you stir.

A material that does not dissolve is called insoluble.

Soluble or insoluble is a physical property of the material.

Video: the sugar vanishing while the sand stays — video and article.

Part 1 — MAT-012 — Classify a substance as soluble or insoluble in water based on whether it dissolves; coin soluble, insoluble

Check: example sequence: soluble (sugar) → soluble (salt) → insoluble (sand) → soluble (drink powder) → insoluble (chalk) → rule; fluency quiz: soluble or insoluble, 6 fresh cases described by what happens (flour clouds then settles; instant coffee vanishes; gravel; baking soda) ; misconception item: a student says the dissolved sugar has gone — the key corrects: it is still there as particles too small to see

Figure: SVG: two glasses after stirring — clear sugar water, sand on the bottom; a table of the five cases sorted

Leans on: T1 L02 (particles too small to see) — one recall question; MAT5-001 retrieved

Part 1q — Fluency quiz: soluble / insoluble

Check: fluency

Figure: —

Leans on: —

Conductors and insulators L05

A metal spoon and a wooden spoon stand in the same pan of hot soup.

After a minute the metal handle is too hot to hold.

The wooden handle is still cool.

The same heat reached both.

Why did only the metal handle get hot?

The point, stated first

Which materials let heat and electricity pass through them?

Heat travels easily through the metal spoon and hardly at all through the wood.

A material that lets heat pass through easily is called a conductor.

A material that does not is called an insulator.

The same words are used for electricity: put a material into a simple circuit, and if the bulb lights, the material conducts electricity.

Metals conduct both heat and electricity; wood, plastic and rubber conduct neither.

Video: the metal handle warming while the wooden one stays cool; the bulb lighting for the metal and not for the plastic — video and article.

Part 1 — MAT-013 — Sort materials into thermal and electrical conductors or insulators based on their properties; coin conductor, insulator

Check: example sequence on heat: conductor (steel) → conductor (copper) → insulator (wood) → insulator (plastic) → rule; then the electricity test on the same four; fluency quiz: conductor or insulator, 8 fresh materials (aluminum foil, a rubber glove, a glass rod, an iron nail, a cork, a silver coin, a wool sock, a copper wire), each stem naming heat or electricity; misconception item: a student says a material that conducts heat cannot conduct electricity — the key corrects: metals conduct both

Figure: SVG: the two spoons in the pan with heat arrows up the metal handle; SVG: the circuit — battery, bulb, two clips, a material between the clips, the bulb lit for the metal and dark for the plastic; table: four materials × two tests

Leans on: L01 (physical property) — one recall question; ENE-025 (Energy strand) NOT taught here: the heat test is shown as the spoon scene; the electricity test is one sentence and a drawing

Part 1q — Fluency quiz: conductor / insulator

Check: fluency

Figure: —

Leans on: —

Notes

Question 1 above: keep as one lesson or split by heat and electricity. Register note for your pass: MAT-013 enumerates two property families in one behaviour.

Topic close

Mixed mastery practice: 10–12 items across the five atoms; the coined terms by typed recall (physical property, volume, soluble, insoluble, conductor, insulator); two typed cylinder readings in mL; one short written answer (why the dissolved sugar is still there).

Then the PP100: 20 four-option MCQs on fresh instances, tagged easy / medium / hard by depth of reasoning, at least one item per atom.

The course architecture (14 topics) — open only if you want the whole map

Skill: course-build → atomise (architecture, step 6b gate) → write-like-james @ 4c9e849

MS Chemistry — course architecture v1 (for James's approval, 25 September 2026)

Read this in five minutes. It decides the topics, their order, where every PP100 sits, and which topic pilots first. Nothing below writes a lesson sentence. The atom register stays where it is: the Matter strand of the Science Knowledge Graph (92 atoms, JM-reviewed). This document arranges those 92 atoms into a course and stops.

The takeaways

Fourteen topics, one PP100 at the end of each, 92 lessons in all. One atom, one lesson. Topics run 4 to 12 atoms; the average is 6 or 7.
The order follows the big ideas, not the TEKS list: what matter is and how particles explain it → what properties tell you → sorting matter into kinds → inside the atom and the periodic table → how matter changes → two grade-8 applications (water, acids and bases).
Topic 1 is the pilot: "Particles and the three states of matter", 12 lessons. It stresses every treatment the course will need — a two-part test taught by examples, a fact, two "explain the smell" mechanisms, three example-sequence classifications, three particle-picture why-lessons, one coined term with a ranking routine. Its blueprint is the second deliverable.
Density is its own topic. It carries the course's first two calculation routines, so it gets its own practice set and PP100 (vault ruling: a quantitative subtopic becomes its own topic).
Three checkpoint tests, at the three natural seams, anchored to the released grade-8 STAAR, Florida SSA and AZSCI forms. Grade-level slices remain derivable from the TEKS stamps if operations later want them.
Five prerequisites live in other strands and are not taught here. Each lesson that leans on one states it in a sentence and asks one recall question. Nothing is assumed (stand-alone entry rule).
Seven register observations for your atomisation pass. No atom was edited; the register is read-mostly.

Status (25 September, later the same day): you approved Topic 1 as the pilot and clarified delivery (video or article per atom, then questions). Card 5 records that. The ask now: approve or edit the Topic 1 blueprint (course_preview/review/BLUEPRINT_T01.html); lesson writing starts on your word.

Card 1 — The topics

The call: fourteen topics in the order below, a mixed mastery practice set then a PP100 at the end of every one.

#	Topic (student-facing title)	Atoms	Lessons	TEKS stamp	The big idea it serves
1	Particles and the three states of matter	MAT-001, 002, 003, 004, 016, 016b, 017, 017b, 018, 018b, 019, 019b	12	6.6A	Everything is made of moving particles; that explains solids, liquids and gases
2	Changing state	MAT-020, 021, 022, 023, 024, 025, 026, 026b	8	6.6A (NGSS MS-PS1-4)	Heating and cooling change how particles move, not what they are; mass holds
3	Physical properties	MAT-005, 006, 007, 012, 013	5	6.6D	Properties you can measure without changing the substance
4	Density	MAT-008, 009, 010, 011, 015	5	6.6D	A property that identifies a substance whatever the sample size
5	Pure substances and mixtures	MAT-027, 028, 029, 030, 032	5	6.6B	Sorting matter by how many kinds it contains
6	Solutions and separating mixtures	MAT-033, 034, 035, 036, 037, 038, 039, 040, 041	9	7.6D, 7.6E, pre-6.6B	A mixture keeps its parts' properties, so you can pull it apart
7	Atoms, elements, molecules and compounds	MAT-042, 042b, 043, 044, 045, 046, 047, 048	8	7.6A	One kind of atom or more than one: the particle-level sort
8	Inside the atom	MAT-049, 050, 051, 051b, 052	5	(NGSS MS-PS1-1; FL SC.8.P.8.7)	Protons decide which element an atom is
9	The periodic table	MAT-053, 054, 054b, 055, 056, 057, 058	7	6.6C	The table arranges elements so position predicts properties
10	Chemical formulas	MAT-059, 059b, 060, 061	4	7.6B	A formula counts atoms; change the count and you change the substance
11	Physical and chemical change	MAT-062, 063, 064, 064b, 065, 065b	6	7.6C	Did a new substance form? The one test, and its evidence
12	Chemical reactions and conservation of mass	MAT-066, 067, 068, 069, 069b, 070, 071, 072	8	8.6E, 8.6B	Reactions rearrange atoms; none appear or vanish, so mass holds
13	Water's special properties	MAT-073, 074, 075, 076	4	8.6C	Water particles pull on each other and on other surfaces
14	Acids and bases	MAT-077, 078, 079, 080, 081, 082	6	8.6D	Two families of substance, one scale, and what happens when they meet

Totals: 92 lessons, 14 practice sets, 14 PP100s (280 items), 3 checkpoint tests. Two atoms may need a second lesson once blueprinted — MAT-010 (calculate density) and MAT-061 (coefficients and parentheses) — so plan for 92 to 94.

Why this grouping

Every prerequisite edge in the register points backwards in this order. Checked atom by atom; no forward reference.
Sub-domains 2 and 3 were each split in two (Topics 3/4 and 1/2). SD-3 has 16 atoms; a 20-item PP100 over 16 atoms certifies nothing. SD-2 bundles a calculation routine with observational properties.
Topics 5 to 7 form one sort of matter in three passes: by how many substances (5), by whether it is a solution (6), by what the particles are (7). The full classification tree (MAT-047) closes Topic 7.
Topics 13 and 14 sit last. Nothing depends on them, they are the register's only pure grade-8 applications, and the checkpoint before them then covers a clean block.

What changes: the course folder gets one topicNN_build/ folder per topic; Topic 1's blueprint is written; nothing else is authored until you approve it.

Card 2 — Topic 1 is the pilot, at 12 lessons

The call: pilot "Particles and the three states of matter" end to end — 12 lessons, quiz after each, mixed practice, PP100 — before any other topic starts.

Why

The vertical-slice rule asks for a routine, a categorical concept and an explanation in the pilot. Topic 1 has all three: three example-sequence classifications (solid, liquid, gas), three why-lessons on the particle picture, a ranking routine that coins the course's first technical term, and a transformation (heating speeds particles).
It is the course's foundation. Every later topic reuses its one particle picture and its four sentences about arrangement and movement.
SD-1 alone (4 atoms) would pilot fast but would not test a PP100 worth the name, and has no routine.

The alternative is a 10/10 cut: move the two kinetic-energy atoms (MAT-019, 019b) to the front of Topic 2, where kinetic energy is the lever for melting. I kept them in Topic 1 because TEKS 6.6A names kinetic energy in the states comparison, and the ranking closes the three-box picture.

What changes: the Topic 1 blueprint is the next thing you read.

Card 3 — Density stands alone

The call: Topic 4 "Density" (5 atoms) is separate from Topic 3 "Physical properties" (5 atoms).

Why

Density carries two routines (displacement volume, MAT-008; calculate density, MAT-010) plus the sink-or-float prediction and the "same whatever the sample size" fact.
Vault ruling (AP Biology, 10 Sep 2026): a topic test that mixes a calculation routine with a content topic hides which one failed.
Solubility (MAT-012) and conductors (MAT-013) stay in Topic 3 as properties; Topic 6 retrieves solubility with a recall question.

What changes: two PP100s where the register had one sub-domain.

Card 4 — Checkpoints at three seams

The call: three static checkpoint tests, each with some free response, at the ends of Topics 6, 10 and 14; the third doubles as the end-of-course test and is anchored to released grade-8 STAAR, Florida SSA and AZSCI items.

Why

The seams are natural: Topics 1–6 are matter you can see and handle; 7–10 are the atom and its table; 11–14 are change and two applications.
No state tests middle-school science before grade 8, so there is no per-grade instrument to anchor to (HANDOFF recommendation 1). The TEKS stamps (6.x/7.x/8.x on every atom) still allow a grade-level slice later without re-atomising.
Five interchangeable forms per test is the standing ruling for topic tests; whether checkpoints also get five forms is your call.

What changes: nothing yet. Checkpoints are built after the topics they cover.

Card 5 — Delivery: video or article per atom, quiz straight after

The call: every lesson (one per atom) ships as BOTH a 40–90 second video and a short article, and the student chooses which to take; the quiz follows in the app, never inside the video. At topic end: mixed mastery practice (any format, key terms by recall), then the PP100 (20 MCQs, easy/medium/hard). No topic intro or summary videos.

Why

Your format ladder of 25 September, with your clarification the same day: each atom is a video with the option to read the article instead. The platform's learner's-choice mode carries exactly that.
When video and text are alternatives, each must teach the whole part (vault rule), so the video script (write-video-script) and the article (write-lesson) are written from the same blueprint row and reviewed against each other.
Pitched one notch up from the Grade 3 Forces pack: no title slide, open on the first example, rule stated last, everything appears on the word that names it. Middle school may carry a short "why" where Grade 3 stayed qualitative.
The ladder names no intro or summary video. AP Biology and HS Chemistry ran different intro policies; I have not inherited either.

Skills that run per lesson, in order: write-lesson (dispatching by lesson type) for the article → write-video-script for the video → design-check-sequence then write-mcqs for the quiz → review-accuracy (a reader who did not write it, against the reference) → review-figures on every rendered figure → review-lesson (blind key read, guidance read, adjudication) → blind review of every key before anything ships.

Figures: the blueprint names the figure kind per part. Particle pictures are always monochrome SVG drawings, one depiction reused everywhere. Real scenes a student should recognise (a tea bag colouring water, sand pouring into a jar) are licensed stock photos where the photo carries the point; a drawing where the point is a measurement or a label.

What changes: the blueprint carries a delivery line and an SVG-or-photo call on every figure.

Card 6 — Five prerequisites are taught in other strands

The call: the five cross-strand prerequisites below are not taught in MS Chemistry. Each lesson that leans on one states the fact in one sentence and asks one recall question before using it.

External atom	What it says	Leaned on by
ENE-020	Temperature measures average particle motion	MAT-004 (Topic 1)
ENE-021	Heat flows from hot to cold	MAT-020–023 (Topic 2)
ENE-025	Thermal conductors and insulators	MAT-013 (Topic 3)
FOR-017	Spot a magnetic force	MAT-041 (Topic 6)
LIF-073	The photosynthesis word equation	MAT-072 (Topic 12)

Why

Stand-alone entry rule: no student has taken the 3–5 courses or the sibling MS courses, so every lesson stands alone.
One loop to know about: ENE-020 (Energy) lists MAT-002 and MAT-003 as its prerequisites, and MAT-004 lists ENE-020. Inside this course MAT-004 carries the "hotter means faster particles" idea itself; the Energy course will meet it as retrieval.

What changes: the blueprint's "leans on" column names the external atom wherever it applies.

Card 7 — Register observations, no edits made

The call: seven observations for your atomisation pass. I changed nothing in the register.

MAT-013 sorts materials as thermal and electrical conductors — two property families in one behaviour (the "and" audit). Candidate split.
MAT-022 "Evaporation and boiling" — evaporation happens at the surface below the boiling point; boiling happens throughout at one temperature. Two predictions, one atom. Candidate split.
MAT-050 states the charge and location of three particles — six facts in one contrast frame. HS Chemistry kept a similar profile atom whole as an argued exception; flagging for the same argument here.
MAT-061 counts atoms with "a coefficient, parentheses, or both" — two routines, likely two lessons.
MAT-019b may not fail independently of MAT-019 in practice. Kept as its own lesson; the data decides (guide: never pre-emptively merge).
MAT-004 → MAT-016/017/018. Identifying a solid from its behaviour does not need "heating speeds particles". The edge is honoured in the order, but it looks like a sequencing edge rather than a knowledge one.
MAT-042 has no in-strand prerequisite and enters via MAT5-084 only; Topic 7 must open with the particle picture from Topic 1 as its retrieval.

What changes: nothing until you rule. Atom edits happen in the knowledge-graph repo with a log entry.

About this build (kickoff record)

Register: Science Knowledge Graph/data/atoms/06-08/matter.json, pulled 25 September 2026, 92 atoms in 13 sub-domains. Per-course choices are the register's: K-8 IDs with letter suffixes; Fact / Categorical / Transformation / Routine; bare behaviours; verdict/reason split by default.
Endpoint: grade-8 STAAR, Florida SSA and AZSCI physical-science items; NGSS MS-PS1-1/2/4/5.
Sources read: knowledge-graph HANDOFF and CLAUDE; vault CLAUDE, 00 Protocol, the PP100 and build-process-v2 rulings, the blueprint rule; the Grade 3 Forces feedback log; the chemistry misconception research (particle model area). HS Chemistry Unit 1 was opened before this document was written; under your same-day correction it is reference only, and Topic 1's scenes were chosen fresh.
Coverage check (standards mapped onto this architecture, never the other way): every Matter atom sits in exactly one topic; every TEKS 6.6/7.6/8.6 knowledge code in the register appears in at least one topic. Blank cells in the register (e.g. NGSS on solutions, TEKS on atomic structure) are register findings, not gaps in this course.

What happens next

You approve or edit the topic table. Then you read the Topic 1 blueprint. Only after that does write-lesson run on Topic 1, one lesson at a time, starting with the first of each lesson type as its exemplar.