Topic 4 · How rubbing makes a pull with no touch — the question types, for your rulings

Skill: course-build → write-mcqs → write-explanation, design-check-sequence @ cca3af6

Topic 4 — How rubbing makes a pull with no touch — the PP100's question types, with their exemplars

What this page is. James reads a bank as its question TYPES first (vault: A bank is reviewed as its question types first, one exemplar each). Under the Grade 5 standing brief the bank is built straight away (52 items in content/G5T04_pp100_bank.py); this sheet is the way in. Each type line says what the stem asks, what the four options (or the accept list) are, and prints one exemplar in full. Tags follow depth of reasoning — easy = one fact or a one-step sort; medium = the rule applied to a fresh case, or a reason picked; hard = a term produced, a claim judged by its correct reason, two ideas chained, or a set — and rise with the atom's order: FOR5-060 (rubbing charges) nine easy, two medium, one hard; FOR5-061 (a charged object attracts) six easy, six medium, two hard; FOR5-062 (charged pairs) three easy, five medium, four hard; FOR5-063 (the evidence, the capstone) one easy, seven medium, six hard. Every hard item carries a one-line "hard because" (hb) in the bank file.

Rulings already applied. Four options on every MCQ (fixed sets: which-word "electrically charged / uncharged / a magnet / sticky"; what-it-does "It moves toward it / It stays where it is / It moves away from it / It spins around"; the pair "They attract / They repel / They hang still / They spin around"; which-force "its weight / the magnetic force / a charged object's pull / a contact force" — each listed in KEY_TELL_EXEMPT_SETS, the key moving within the set); no option bundles a verdict with its reason (every bank claim is "X is wrong … What is the correct reason?" with four single-statement reasons; the 8 Oct verdict-and-reason conflict is applied as the 28 Sep tiers written, so no exception is named); every stem is a positive question of at most two sentences unless tagged hard; "electrically charged" and "uncharged" are recalled by MCQ (RECALL_BY_MCQ: a two-word term and a nine-letter word); the typed keys are "rubbing", "attract" (twice: a charged-and-uncharged scene and a charged-pair scene), "repel", "magnetic force" and "weight" (each a lexicon word or phrase; the force names accept every article form and never the plural "forces"; "gravity" is the trap with its own feedback line); one multi-select, where the answer is genuinely a set; every item names ONE atom; US spelling; units as words. MCQ keys A 11 · B 15 · C 11 · D 8 (45 MCQs); the six typed items and the multi-select carry no letter.

The bar list (real things a generated item must never use): "gravity is a force", "gravity pulls" (gravity names the happening; the force is weight); "static electricity", "the electric force", "electrons", "negative / positive charge" (grades 6-8; here the pull is "the charged balloon's pull" and the charge is just "electric charge"); "sticky" as a fact (the register's belief, met and corrected in Lesson 2 (What a charged balloon can pull)); "lift" and "leak"; heat from rubbing as a cause of the pull (ENE3's atom); any lesson scene (Dorian's balloon over the paper bits with the wool sweater, the comb through his hair; Elsie at the sink with the water stream, the tissue strip on the ruler, the ping-pong ball; Emmett's two balloons on threads and the wool scarf; Miss Delgado's desk with the paper clip, the eraser and the tissue strip; the intro's wool hat); any quiz, attached, summary or practice scene (the ruler from a drawer and the wool sleeve; the comb through hair and thread; the pen on a wool scarf; the foam cup and cotton cloth; the spoon from a drawer; the plastic slide; the lid and thread; the salt grains; the soda can; the spoon and feather; the lid and tissue; the straw with foil, rice and thread; rulers and straws on strings; the straw and its wool cloth; two combs; hairs after a comb; the ruler and plastic wrap; the falling pencil; the nail and magnet; the key and wooden block; the marble; the soccer ball; the mitten; the pepper; the foam cups and hat; the comb and plastic wrap; the pin and magnet; the acorn; the leaf; the sock and lid); a claim-maker from another topic's row (only Dorian, Elsie and Emmett).

The eleven types (fewer would be better; four atoms each need the what-rubbing-does / what-it-does / which-word forms, and the capstone needs the which-force, evidence, claim and set forms)

Type	Items	Atom	Tags	Form	The stem asks…	The options / the accept	Exemplar scene
1	3	060	easy	MCQ	what rubbing does to a thing; which action charges it	leaves it electrically charged / makes it wet / makes it heavier / turns it into a magnet; rubbing on a blanket / folding / filling with air / the fridge	a plastic bag; a plastic folder; a bag on a blanket
2	5	060, 061	easy	MCQ, the which-word set	which word describes a described thing (charged, uncharged); which word says what it does (attracts)	electrically charged / uncharged / a magnet / sticky; attracts / repels / warms / pushes	a rubbed bottle; a bottle on a shelf; a cup; a glass rod and a leaf; the leaf
3	5	060	easy, medium	MCQ	where the charge came from; what must be done to charge it; which of two things pulls thread; what left the fur charged; the reason only the rubbed bag pulls	four single answers or reasons	a cloth on a jar; a spoon; two cups; a cat and a brush; a new bag
4	6	061	easy, medium	MCQ, the what-it-does set	what the uncharged thing does near the charged thing (and near an unrubbed one); what the hanging charged thing does near an uncharged block; what a charged ruler pulls	It moves toward it / stays where it is / moves away from it / spins around	a cotton ball; sugar grains; a dandelion seed; a hanging bag and a block
5	4	061	easy, medium	MCQ	when the foil starts to move; what tells you the bag is charged rather than sticky; the reason it pulls all three; what a charged ruler pulls, against a magnet	four single statements	a glass rod and foil; a newspaper strip; thread, a leaf, sand
6	7	062	easy, medium	MCQ, the pair set	what two charged things do (both rubbed the same way; a thing and the wool it was rubbed on; neither rubbed); which observation tells you they attract; what can happen	They attract / They repel / They hang still / They spin around	two ribbons; two bag strips; a strip and its blanket; two foam plates
7	1	062	medium	MCQ	the correct reason two strips spread apart	four single-statement reasons	two bag strips on a sock
8	5	063	easy, medium	MCQ, the which-force set	which force moved the thing, nothing having touched it (a fall, a jump to a magnet, a jump to a charged bag, a hand's push)	its weight / the magnetic force / a charged object's pull / a contact force	a basketball; a steel washer; a tissue and a bag; a toy truck; an apple
9	9	061, 062, 063	medium, hard	MCQ	which observation shows a force acting without touching; what is true of both forces; which things Earth pulls; a child's claim is wrong — the correct reason (the three register beliefs); two ideas chained (one strip near two things; which of two pulls the scrap; which force pulls down while the magnetic force pulls sideways)	four single statements	a snowflake; a pear and a spoon; a bolt and a wooden spoon; Emmett's comb; Elsie's pair; Dorian's magnet; a strip and a blanket; a tissue scrap; a hanging key
10	6	060, 061, 062, 063	hard	typed	the one word for what was done to the spoon; the word for what the bag does to the feather; the word for what two ribbons do; the word for what a ribbon and its wool do; the name of the force that pulled the bolt up; the name of Earth's pull on the raindrop	rubbing / attract / repel / attract / magnetic force / weight, each with article forms and child spellings	a spoon; a bag and a feather; two ribbons; a ribbon and wool; a bolt; a raindrop
11	1	063	hard	multi-select	the TWO forces that act without touching	the magnetic force / a contact force / an object's weight / friction (keys: the magnetic force, an object's weight)	the set

Hard because — type 9's claim items: each register belief is judged by its correct reason against an overstatement the other way; type 9's chained items: two rules applied in turn to one thing, or two forces told apart on one object. Type 10: the word or the force's name is produced, not picked. Type 11: a set held together.

One exemplar per type, in full

Type 1 (easy, FOR5-060). A plastic bag is rubbed on a wool blanket. What does the rubbing do to the bag? — It leaves the bag electrically charged. / It makes the bag wet. / It makes the bag heavier. / It turns the bag into a magnet. Why: Rubbing two things together can leave a thing electrically charged. The bag was rubbed on the wool blanket. So the rubbing left the bag electrically charged. (nearest lesson-side instance: Lesson 1 (What rubbing does to a balloon), question 3, the comb through hair, three options — here the set is four and the magnet trap is the fourth)

Type 2 (easy, FOR5-060). A plastic bottle has stood on a shelf all week, and nothing has rubbed it. Which word describes the bottle? — electrically charged / uncharged / a magnet / sticky. (nearest: Lesson 1 (What rubbing does to a balloon), question 9, the spoon from the drawer, three options)

Type 3 (easy, FOR5-060). A cotton cloth is rubbed on a plastic jar, and now the jar is electrically charged. Where did the charge on the jar come from? — The jar made it while it was being rubbed. / The rubbing moved it from the cloth onto the jar. / It came from the air in the room. / It came up out of the table the jar stood on. (nearest: Lesson 1 (What rubbing does to a balloon), question 5, the foam cup and cotton cloth)

Type 4 (easy, FOR5-061). A charged plastic bag is held near a cotton ball on a table, without touching it. What does the cotton ball do? — The cotton ball moves toward the bag. / The cotton ball stays where it is. / The cotton ball moves away from the bag. / The cotton ball spins around. (nearest: Lesson 2 (What a charged balloon can pull), question 1, the salt grains, three options)

Type 5 (medium, FOR5-061). A charged plastic bag pulls a strip of newspaper toward it before they touch. Which of these tells you the bag is charged rather than sticky? — The bag is made of smooth plastic. / The strip is very thin and light. / The bag was rubbed on soft wool. / The bag pulls the strip from across a gap. (nearest: Lesson 2 (What a charged balloon can pull), question 5, the lid and tissue, three options)

Type 6 (easy, FOR5-062). Two ribbons are both rubbed on the same wool blanket and hung side by side from threads. What do the ribbons do? — They attract. / They repel. / They hang still. / They spin around. (nearest: Lesson 3 (Two charged balloons: pull together or push apart?), question 1, the rulers on strings, three options)

Type 7 (medium, FOR5-062). Two strips cut from a plastic bag, both rubbed on a wool sock, spread apart when held together by their tops. What is the correct reason? — The strips are too light to hang straight. / The air pushes the strips apart. / Only one of the strips is charged. / Both strips were rubbed the same way. (nearest: Lesson 3 (Two charged balloons: pull together or push apart?), question 6, the hairs after the comb)

Type 8 (medium, FOR5-063). A steel washer lies on a desk, and a magnet above it makes the washer jump up before they touch. Which force pulled the washer up? — its weight / the magnetic force / a charged object's pull / a contact force. (nearest: Lesson 4 (How to show that a force can act without touching), question 2, the nail sliding to the magnet, three options)

Type 9 (hard, FOR5-063). Dorian says a magnet is the only thing that can move something without touching it. Dorian is wrong. What is the correct reason? — A magnet never pulls without touching. / Earth and a charged object also pull without touching. / A magnet pulls only when it touches steel. / Only Earth pulls without touching. Hard because: the register's only-magnets belief is judged by its correct reason against two overstatements. (nearest: Lesson 4 (How to show that a force can act without touching), question 4, Elsie's claim as bare yes / no)

Type 10 (hard, FOR5-063, typed). A raindrop falls from a cloud to the ground, and nothing touches it on the way down. Earth's pull on the raindrop has a name. Type the name of this force. — accept: weight, its weight, the weight, weigth, wieght, its wieght, the raindrop's weight, raindrop's weight; "gravity" → "Gravity is the name for the happening, and the force is Earth's pull. Earth's pull on an object is called its weight." Hard because: the force's name is produced, and the student's own word, gravity, is the trap. (nearest: PR-16, the pine cone)

Type 11 (hard, FOR5-063, multi-select). Select the TWO forces in this list that can act without touching. — the magnetic force / a contact force / an object's weight / friction. Hard because: a set is held together. (nearest: Lesson 4 (How to show that a force can act without touching), question 7, what the three forces have in common)

Draw constraints (⟂ = never in the same twenty-item draw; adjudication, 8 Oct 2026)

A later item never gives away an earlier answer. From the blind read's give-away pairs, read from stems, keys and option text: PP-27 ⟂ PP-48 (what a charged ruler pulls, against a magnet; the magnet-and-tissue reason) · PP-27 ⟂ PP-38 ("a magnet pulls only steel and iron" in PP-27's stem answers PP-38's bolt-and-spoon) · PP-47 ⟂ PP-51 (Dorian's correct reason lists the two forces PP-51 selects) · PP-47 ⟂ PP-37 (the same reason states PP-37's shared fact) · PP-41 ⟂ PP-21 and PP-41 ⟂ PP-22 (Emmett's correct reason, "the comb is electrically charged", is PP-21's key and PP-22's premise) · PP-43 ⟂ PP-30 (Elsie's correct reason is one half of PP-30's key). The claim stems PP-41, PP-43 and PP-47 now quote the claim first ("Emmett says…"), state the verdict, and ask for the correct reason; no reason is printed in a stem.

Design-move inventory (move · scene kind · nearest earlier item)

Every bank item's move was written first and read against the quizzes, the attached questions, the practice set and the lessons' own cases. Moves that the atom forces to repeat (rubbing charges; a charged thing pulls an uncharged thing; two things rubbed the same way repel) are kept apart by scene KIND — a classroom desk, a kitchen, a bedroom, a garden, a cat — and by the ask (what happens / which word / where from / why / which force). Items sharing a move with a scene kind that differs only a little are marked ⟂ draw-one-per-test:

• PP-16 (two ribbons, repel) ⟂ PP-17 (two bag strips, repel) ⟂ PP-31 (two foam plates, the hanging one swings away): one move, three scene kinds; draw one.
• PP-10 (a cotton ball moves toward the bag) ⟂ PP-11 (sugar grains move toward the ruler): draw one.
• PP-21 (why only the rubbed bag pulls) ⟂ PP-09 (which of two cups pulls thread): the same fact asked as a reason and as a pick; draw one.
• PP-43 (Elsie's claim, the correct reason) ⟂ PP-30 (which of these can happen): PP-30's key states the rule PP-43 rests on; draw one.
• PP-38 (which does Earth pull: both) ⟂ PP-48 (which of two pulls the scrap: only the charged ruler): the same contrast from the two sides; draw one.
• The typed items PP-42 and PP-46 both key "attract" (a charged-and-uncharged scene; a charged-pair scene): draw one.

No item prints another's answer on the page: the which-word set's members are the asks of their own items only; the force set's "a contact force" is keyed once (PP-35) and is a distractor elsewhere.