Skill: write-like-james @ 58d971a · the build: write-lesson, write-mcqs, write-video-script @ 58d971a

Topic 18 "Which has more?" — your read (28 September 2026, night)

Four lessons in the Matter strand, after the measuring tools: which has more mass (a pan balance), everything takes up space (the new atom from Olivia's comment), which takes up more space (two cylinders of water), which is warmer (two thermometers read on the same side). Read by the author as you, then a non-author review (25 findings, all adjudicated and applied), then a cold read of every changed item (30 of 30 keys agreed). Reply by number.

The three that unblock the bank

1. Do the nine question types stand, with the typed hard tier? Your night ruling is applied: the hard tier is typed — the name of the object with more mass on the balance where the much bigger thing's pan hangs higher (text), the name of the object that takes up more space when the balance said the other has more mass (text), and the warmer thermometer's reading (numeric, 84 °F). Easy and medium are four-option MCQs and are the bulk. Three types are shown in two forms, so the sheet carries twelve exemplars; every atom is tested alone and in a pair. The nine types, twelve exemplars, coverage table Approve all / strike these / edit these

2. Does "You cannot tell from the balance" stay as the fourth option on the balance type, where it is never the key? On the cylinder type it now IS the key once (a cork floats, so the water cannot show its space — PP-8) and on the thermometer type once (two readings from different sides — PP-9), which also tests the setup rule each lesson states. On the balance no honest instance exists: two objects on two pans always settle. Recommendation: keep it — it names the belief that a balance cannot compare two different kinds of thing, and the option set then reads the same across the three comparison types. Keep / replace with a fourth object-free option

3. Is L02 "Everything takes up space" placed right, between the mass lesson and the space lesson? MAT3-062 is the prerequisite of the space comparison, so it sits directly before it, and L03 reuses its sentence word for word to say why the water moves up ("The marble takes up space. The water cannot be in that space. So the water moves up."). The topic still opens on the surprising pair — the small stone with more mass than the big sponge. The other order puts a fact lesson first, ahead of the "which has more" family the title names. The reviewer agrees. Architecture row 18 is updated provisionally. L02 Keep / open the topic on it

The lessons

4. L01 Which has more mass? — the empty balance is level; the stone's pan hangs lower, so the small stone has more mass than the big sponge, and nobody says why; an apple and a grape; a golf ball and a ping-pong ball of the same size; a pear and an orange hang level. Quiz: eight drawn balances and scale pairs, three of them the trap (a coin outweighs a feather, a brick a pillow, a nut a cotton ball). Article · script · quiz Fine / say where

5. L02 Everything takes up space — Olivia's grid: the red block fills square B, so Orin's blue block cannot go there; it goes on D; the red block moves and B is free; a long block fills A and B; Koa's chair. "The space the block takes up is exactly as big as the block." Every object now fills its square edge to edge (the review's first block). The second angle in the register — a room, a car, a balloon as a space you can close — is left for the air lessons. Article · quiz Fine / say where

6. L03 Which takes up more space? — two cylinders at 50 mL; a marble and a bolt; each sinks; the marble's water is higher, so the marble takes up more space although the bolt has more mass; a big and a small pebble; a die and a domino at the same level. "Volume" is said once, after the rule, as an aside — the same word Topic 17 gave a liquid — and no item tests it (the reviewer's call, applied; say if you want the word live). Article · quiz Fine / say where

7. L04 Which is warmer? — Perla's two hands give two answers about one bowl; a thermometer in each cup, both read on the Fahrenheit side: 54 °F and 104 °F; the same number, the same temperature; then the trap: cup A read on the Fahrenheit side, cup B on the Celsius side — "the two numbers come from different sides, so the bigger number does not tell you which is warmer; read the same side on both." No conversion anywhere. Article · quiz Fine / say where

Applied without asking

Hard bank items typed; every attached question stands alone with its own drawing; no option bundles a verdict with a reason; every stem a positive question; hard means more of the skill; colour and no drawn people (the chairs and the bowls are cartoons for David, the stone and sponge a photo); "mass" as how much stuff, the stone fact with no why and no "density"; nothing "weighed" or "heavier"; every water and thermometer level a whole number of marks on Topic 17's imported scales, checked by code and by two readers; the register notes for MAT3-062, 005 and 006 (including "compares objects that sink") wait in ATOM_PROPOSALS_G3T18.md for your word.

Also on the site

Intro and poll · summary and three questions · mixed practice · the blueprint's decisions

After you answer

1 and 2 → a bank of about fifty from the approved types, a second cold read, the hand-over folder for David. 3 → the architecture row stands or the lessons renumber. Register notes → the knowledge-graph repo.