Bones by name: shoulders, arms and hands

Tests: 8 of 11 right · Exam: 2 of 4 right · Kind: plain · Understood: 9 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 358 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.

Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.

Test 1 · right ✓

Count them: one hand has 27 bones. How many bones are there in both hands?

1. 27 — score 5
2. 54 — ← Mova's choice · ✓ the right answer · score 6
3. 108 — score 5
4. 44 — score 5

Why: It took the question to ask what it is done to. It chose option 2 with score 6, against 5 for the next best. Its support: lesson 358, line 10: «Each hand has 27 bones: 8 in the wrist, 5 in the palm and 14 in the fingers, so both hands together have 54, about a quarter of all the body's bones.», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+4); the same thing acted on «54» (+3). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 2 · wrong ✗

Count them: a hand has 5 bones in the palm and 14 in the fingers. How many bones does the hand have without the wrist?

1. 27 — ← Mova's choice · no support
2. 19 — ✓ the right answer · no support
3. 14 — no support
4. 9 — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 3 · right ✓

Mickey Mouse is drawn with only four fingers on each hand. How many fingers do real people have on both hands, thumbs included?

1. 10 — ← Mova's choice · ✓ the right answer · no support
2. 12 — no support
3. 8 — no support
4. 16 — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 4 · right ✓

In a Tom and Jerry cartoon Tom's arm is tied in a knot and then he shakes it straight. What is true about a real arm?

1. It has stiff bones joined at the shoulder, elbow and wrist, so it cannot tie in a knot — ← Mova's choice · ✓ the right answer · score 3
2. Its bones bend like rubber in children — no support
3. It is boneless and bends anywhere — no support
4. It has one long bone from shoulder to fingertips — score 2

Why: It took the question to ask which statement is true. It chose option 1 with score 3, against 2 for the next best. Its support: lesson 158, line 4: «Cartoons show snakes crushing bones like a garden hose tied in knots; a real anaconda squeezes until the prey's blood stops flowing, and it is a shy animal tha…», reached through the option's own match among the sentences about the question's things. What matched: the same place «knots» (+4); the same action «tie» (+2). Against it: one says «not», the other does not (counts against) (-3). · the question and its options parsed, with trees and pragmatics

Test 5 · right ✓

«banged me elbow, me pinky's tingling, did I break a bone» What is most likely?

1. You hit the nerve called the funny bone; the tingling soon stops — ← Mova's choice · ✓ the right answer · score 7
2. The little finger is broken — no support
3. Yes, you snapped the funny bone clean in half and it needs a plaster cast — score 4
4. You hit a vein in the finger — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 7, against 4 for the next best. Its support: lesson 358, line 4: «Bang your elbow on a table and your little finger tingles: that is the funny bone, which is not a bone at all but a nerve lying close under the skin.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «funny bone» (+4); it fills the role the question asks for (+2); the same thing acted on «bone» (+1). · the question and its options parsed, with trees and pragmatics

Test 6 · right ✓

«fell on my hand off the bike, now my shoulder hurts, that's weird innit» What is the best answer?

1. Shoulders cannot be hurt by falling on a hand — no support
2. Only the hand can be hurt in such a fall — no support
3. A fall on an outstretched arm sends the force up and can break the collarbone, so see a doctor — ← Mova's choice · ✓ the right answer · score 6
4. It is just tiredness from cycling — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 6, the only option with support. Its support: lesson 358, line 5: «The collarbone is one of the most commonly broken bones in children, often from falling on an outstretched arm, which sends the force up to the shoulder; it us…», reached through the same lesson line as the sentence the question matched. What matched: the same action «send up» (+4); the same thing acted on «force» (+1); a different doer (counts against) (+1). · the question and its options parsed, with trees and pragmatics

Test 7 · right ✓

«cracking knuckles gives you arthritis, my nan says» What is fairest to say?

1. It breaks the knuckle bones — no support
2. It makes your fingers grow longer — no support
3. Doctors have proven again and again that it causes arthritis — no support
4. Studies have not shown that it causes arthritis — ← Mova's choice · ✓ the right answer · score 4

Why: It took the question to ask which statement is true. It chose option 4 with score 4, the only option with support. Its support: lesson 358, line 13: «Cracking knuckles makes a pop as a gas bubble forms in the joint fluid; one doctor cracked the knuckles of one hand for 60 years and found no arthritis, a pain…», reached through the same lesson line as the sentence the question matched. What matched: the same action «show» (+4). · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

Why does it take a while before you can crack the same knuckle again?

1. The muscle is too tired — no support
2. The gas bubble needs time to dissolve back into the fluid — ← Mova's choice · ✓ the right answer · score 2
3. The tiny crack in the bone needs time to heal first — no support
4. The joint locks for a day — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 2, the only option with support. Its support: lesson 358, line 13: «Cracking knuckles makes a pop as a gas bubble forms in the joint fluid; one doctor cracked the knuckles of one hand for 60 years and found no arthritis, a pain…», reached through the same lesson line as the sentence the question matched. What matched: the same place «joint fluid» (+3); the same doer «gas bubble» (+1). Against it: a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 9 · right ✓

A doctor sees only a few wrist bones on a child's X-ray, though the child is ten. What might that show?

1. The X-ray machine is broken — no support
2. The child is older than ten — score 1
3. The child's bones are growing slower than usual — ← Mova's choice · ✓ the right answer · score 2
4. The child has lost some wrist bones in an accident long ago — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 2, against 1 for the next best. Its support: lesson 329, line 6: «Reptile lamps give UVB light like sunshine, which helps the body make vitamin D; without it reptiles cannot use calcium and their bones grow soft and bent, and…», reached through the option's own match among the sentences about the question's things. What matched: the same action «grow» (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

What would be hard to do if your thumb could not touch your fingertips?

1. Bend your elbow — ← Mova's choice · no support
2. Swing your whole arm round in a big circle — no support
3. Pick up a small coin or hold a pencil well — ✓ the right answer · no support
4. Stand on one leg — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

Which arm joint can swing in a full circle?

1. The elbow — ← Mova's choice · score 8
2. The knuckle — score 8
3. The wrist — score 8
4. The shoulder — ✓ the right answer · score 8

Why: It took the question to ask what it is done to. It chose option 1 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 358, line 2: «Swing your arm in a full circle: only the shoulder can do that, because it is a ball sitting in a shallow socket, free to turn almost any way, held there mostl…», reached through the option's own match among the sentences about the question's things. What matched: a different doer (counts against) (+4); a different thing acted on (counts against) (+2); the same action «swing» (+1); the same circumstance (+1). The right option, 4, scored 8. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Identify the bone of the forearm situated upon the side of the thumb.

1. The radius — ← Mova's choice · ✓ the right answer · no support
2. The humerus — no support
3. The scapula — no support
4. The ulna — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

State the number of bones of which a single human hand is composed, the wrist included.

1. Five — ← Mova's choice · no support
2. Fifty-four — no support
3. Fourteen — no support
4. Twenty-seven — ✓ the right answer · no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

Which of the following statements most accurately characterises the so-called funny bone?

1. It is a nerve passing the elbow, and not a bone — ← Mova's choice · ✓ the right answer · score 3
2. It is a minute bone within the elbow — score 3
3. It is a muscle of the forearm — score 3
4. It is the distal extremity of the humerus — score 3

Why: It took the question to ask who or what does it. It chose option 1 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 43, line 2: «These egg-laying mammals are called monotremes: the platypus, with a duck-like bill, and four kinds of spiny echidna; they kept an ancient way of having babies…», reached through a sentence linked to the one the question matched. What matched: it fills the role the question asks for (+2); the same doer «mammals» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Select the response consistent with the established facts concerning the shoulder joint.

1. It is a fused joint incapable of motion — ← Mova's choice · no support
2. It is the most stable joint of the body — no support
3. It is a ball-and-socket joint, the most mobile of the body, with a shallow socket — ✓ the right answer · no support
4. It is a hinge joint permitting motion in one plane alone — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/358-bones-by-name-shoulders-arms-and-hands/