The long-necked giants: Diplodocus, Brachiosaurus, Argentinosaurus and Brontosaurus
Tests: 5 of 11 right · Exam: 1 of 4 right · Kind: ★ · Understood: 8 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 266 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 ✓
«my book's got Brontosaurus standing in a lake cos it's too heavy for land» What do we know now?
- 1. No, it lived up in the tall trees like a giant sloth — no support
- 2. Yes, it was too heavy for land so it lived in water — no support
- 3. Yes, it floated about like a boat with its neck up — no support
- 4. Footprints and leg bones show it walked on dry land — ← Mova's choice · ✓ the right answer · score 11
Why: It took the question to ask what it is done to. It chose option 4 with score 11, the only option with support. Its support: lesson 266, line 1: «The sauropods were the long-necked plant-eaters, the biggest animals that ever walked on land; Diplodocus was about 25 metres long, mostly neck and tail, longe…», reached through the remembered sentence the question matched. What matched: the same place «land» (+8); the same action «walk» (+5). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics
Test 2 · ★ · wrong ✗
What would happen if a sauropod had solid bones all through, with no air pockets?
- 1. Nothing would change, because air pockets weigh the same as bone — score 4
- 2. It would shrink down until it was smaller than a dog — score 3
- 3. It would be lighter and able to lift off the ground and fly — ← Mova's choice · score 7
- 4. Its skeleton would be much heavier, perhaps too heavy to stand — ✓ the right answer · no support
Why: It took the question to ask what happens next. It chose option 3 with score 7, against 4 for the next best. Its support: lesson 266, line 12: «Scientists once thought sauropods had to live in lakes to hold up their weight, but footprints and leg bones show they walked on dry land.», reached through what followed the sentence the question matched. What matched: its «because» matches the remembered cause (+4); the same doer «sauropods» (+3). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 3 · ★ · wrong ✗
«giraffe's neck bones vs sauropod's, giraffe has loads more right?» What is right?
- 1. They both have exactly 7 — ← Mova's choice · no support
- 2. No, a giraffe has 7 and a sauropod had 12 to 19 — ✓ the right answer · no support
- 3. Sauropods had no neck bones — no support
- 4. Yes, a giraffe has about 50 — 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 · ★ · wrong ✗
Count them: 4 Diplodocus walk past in a herd. How many legs, heads and tails is that?
- 1. 16 legs, 8 heads and 4 tails — ← Mova's choice · score 2
- 2. 8 legs, 4 heads and 4 tails — score 2
- 3. 16 legs, 4 heads and 8 tails — score 2
- 4. 16 legs, 4 heads and 4 tails — ✓ the right answer · score 2
Why: It took the question to ask what it is done to. It chose option 1 with score 2, tied with another option at 2 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 207, line 13: «A foal stands and walks within a few hours of birth, on legs that are very long for its body, because a wild foal must keep up with the herd.», reached through the option's own match among the sentences about the question's things. What matched: the same light verb (be, have, do, get, go) (+1); it fills the role the question asks for (+1). The right option, 4, scored 2. · the question and its options parsed, with trees and pragmatics
Test 5 · ★ · right ✓
In a cartoon a dinosaur chews its leaves slowly like a cow. What did real sauropods do?
- 1. Ate only stones and never touched a single leaf — score 6
- 2. Licked the juice off the leaves and left the rest — no support
- 3. Swallowed leaves whole and let the gut break them down — ← Mova's choice · ✓ the right answer · score 11
- 4. Chewed every leaf many times with big flat teeth, like a cow — score 9
Why: It took the question to ask what is done. It chose option 3 with score 11, against 9 for the next best. Its support: lesson 266, line 10: «Sauropods did not chew; they stripped leaves, swallowed them whole and let their huge gut break the plants down slowly.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «sauropods» (+3); the same thing acted on «huge gut» (+3); it fills the role the question asks for (+3); the same action «let» (+2). · the question and its options parsed, with trees and pragmatics
Test 6 · ★ · right ✓
«Bronto's not real, my dad says, it's just Apatosaurus» Who is right?
- 1. Dad, the name was dropped for ever — no support
- 2. Brontosaurus is a kind of whale — no support
- 3. Neither, both names are made up — no support
- 4. A 2015 study said Brontosaurus is its own kind again, so the name is back — ← Mova's choice · ✓ the right answer · score -2
Why: It took the question to ask which statement is true. It chose option 4 with score -2, the only option with support. Its support: lesson 266, line 13: «In 1903 Brontosaurus was judged to be the same as Apatosaurus, but a 2015 study said it was different enough to be its own kind again.», reached through the remembered sentence the question matched. What matched: the same action «say» (+1). Against it: the same doer «2015 study» (-3). · the question and its options parsed, with trees and pragmatics
Test 7 · ★ · right ✓
A baby sauropod hatches from an egg the size of a football. What happens next?
- 1. It stays the size of a football for all of its life — score 3
- 2. It changes into a bird after its first year — no support
- 3. It grows to full adult size in just one week — score 5
- 4. It grows thousands of times heavier before it is adult — ← Mova's choice · ✓ the right answer · score 7
Why: It took the question to ask what happens next. It chose option 4 with score 7, against 5 for the next best. Its support: lesson 266, line 11: «Even the giants hatched from eggs about the size of a football, because a much bigger egg would need a shell too thick for the baby to breathe through; a hatch…», reached through what followed the sentence the question matched. What matched: the same action «grow» (+6); the same property (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · wrong ✗
Why might some scientists think many sauropods kept their necks fairly level?
- 1. Lifting the head high makes the heart work very hard — ✓ the right answer · score 2
- 2. They were afraid of the birds flying above the trees — score 1
- 3. Their necks were far too short to lift up high at all — score 1
- 4. They were always bending down to look for water to drink — ← Mova's choice · score 3
Why: It took the question to ask why something happens (its cause). It chose option 4 with score 3, against 2 for the next best. Its support: lesson 190, line 3: «Others were hiding in plain sight: the olinguito was found by a scientist looking at old skins in a museum drawer, like finding a new toy at the bottom of the…», reached through the option's own match among the sentences about the question's things. What matched: the same action «look» (+3). The right option, 1, scored 2. · the question and its options parsed, with trees and pragmatics
Test 9 · ★ · right ✓
A giraffe and a sauropod both have long necks for high food, but they are not related. What is this called?
- 1. Convergence — ← Mova's choice · ✓ the right answer · no support
- 2. Extinction — no support
- 3. Hibernation — no support
- 4. Migration — 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 10 · ★ · wrong ✗
«how does a huge thing like that breathe properly» What helped sauropods breathe?
- 1. Gills along the neck, like a fish — ← Mova's choice · no support
- 2. A big blowhole on top of the head, like a whale — no support
- 3. Breathing only through the skin, like a frog — no support
- 4. Air sacs linked to the bones, like a bird's — ✓ 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
Test 11 · ★ · wrong ✗
«if Argentinosaurus is the heaviest thing ever, beat that» What is true?
- 1. A T. rex was heavier — ← Mova's choice · no support
- 2. Yes, nothing has ever been heavier — no support
- 3. The blue whale is heavier, held up by water — ✓ the right answer · no support
- 4. An elephant is heavier — 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 1 · formal language · wrong ✗
Identify the feature of the sauropod skeleton that is understood to have reduced its overall mass.
- 1. The replacement of the heavy tail by a fin of skin — ← Mova's choice · no support
- 2. The presence of air-filled spaces within the bones — ✓ the right answer · no support
- 3. The complete absence of any bones within the neck — no support
- 4. The composition of the bones from cartilage 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
Exam question 2 · formal language · wrong ✗
Select the response consistent with the established facts concerning the habitat of sauropods.
- 1. They are understood to have lived principally in trees — ← Mova's choice · no support
- 2. Trackways and limb bones demonstrate that they walked upon dry land — ✓ the right answer · no support
- 3. They are understood to have inhabited the open ocean — no support
- 4. They are understood to have dwelt exclusively in deep lakes — 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 ✓
Ascertain the manner in which sauropods processed the vegetation upon which they fed.
- 1. It was swallowed without chewing and broken down slowly within the gut — ← Mova's choice · ✓ the right answer · score 2
- 2. It was stored in pouches within the cheeks — no support
- 3. It was rejected after the extraction of its juices — no support
- 4. It was chewed at great length by flattened molars — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 2, the only option with support. Its support: lesson 266, line 10: «Sauropods did not chew; they stripped leaves, swallowed them whole and let their huge gut break the plants down slowly.», reached through the same lesson line as the sentence the question matched. What matched: the same action «break down» (+2); the same circumstance (+1). Against it: the same property (-1). · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · wrong ✗
Which of the following statements most accurately characterises the phenomenon termed convergence?
- 1. The descent of all organisms of one kind from a single parent within one generation — ← Mova's choice · no support
- 2. The resemblance of offspring to their parents in appearance and habit — no support
- 3. The independent arrival of unrelated organisms at similar solutions to similar problems — ✓ the right answer · no support
- 4. The seasonal movement of animals over great distances in search of food — 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
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