Turtles and tortoises

Tests: 6 of 12 right · Exam: 1 of 4 right · Kind: plain · Understood: 11 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 31 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 · wrong ✗

In a cartoon a turtle unzips its shell and walks out in shorts. What is wrong?

1. Turtles only take shells off in water — ← Mova's choice · score 6
2. Only old turtles can take off their shells — score 6
3. A real turtle's shell is its ribs and spine, so it can never come out — ✓ the right answer · no support
4. Nothing, real turtles take off their shells to sleep at night — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 31, line 3: «Tortoises are the turtles that live only on land, with high domed shells and thick legs like an elephant's; water turtles have flatter shells and webbed feet o…», reached through the remembered sentence the question matched. What matched: the same thing acted on «flatter shells» (+4); the same doer «water turtles» (+2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 2 · right ✓

my mate says the shell rings tell u the age like a tree, his tortoise is 30 cos it has 30 rings. right?

1. Yes, but you must add ten — no support
2. Yes, one ring is exactly one year — no support
3. No, you must count the spots on its legs, one spot for each year of life — no support
4. No, rings can grow several a year or none, so it is only a rough guess — ← 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 31, line 20: «Turtles have no teeth but a sharp beak made of keratin, like your nails, and the rings on a tortoise's shell do not give its exact age, because it can grow sev…», reached through a sentence linked to the one the question matched. What matched: the same action «grow» (+2); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

What would happen if a hotel by a turtle beach left bright lights on all night?

1. Nothing, hatchlings cannot see light — ← Mova's choice · score -4
2. The hatchlings might crawl towards the lights instead of the sea — ✓ the right answer · no support
3. The hatchlings would hatch out faster, as the light warms up the sand — no support
4. The mothers would lay more eggs — no support

Why: It took the question to ask what happens next. It chose option 1 with score -4, the only option with support. Its support: lesson 19, line 15: «A mirror layer at the back of a tiger's eye bounces light back through it, so tigers see far better than us at night and their eyes shine in headlights.», reached through what followed the sentence the question matched. What matched: the same action «see» (+4). Against it: a different doer (counts against) (-2); one says «not», the other does not (counts against) (-6). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 4 · right ✓

A hot summer makes the sand on a turtle beach much warmer than usual. What would scientists expect?

1. More girl hatchlings than boys — ← Mova's choice · ✓ the right answer · score 7
2. All of the babies would be twins — no support
3. Many more boy hatchlings than girls — score 7
4. None of the eggs would hatch at all — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 7, tied with another option at 7 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 31, line 14: «Warmer sand gives more girl hatchlings and cooler sand more boys, and bright beach lights can lead hatchlings the wrong way.», reached through the option's own match among the sentences about the question's things. What matched: the same property (+3); it fills the role the question asks for (+3); the same thing acted on «more girl hatchlings» (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 5 · right ✓

Why does a leatherback have to eat so many jellyfish?

1. It only eats once a year — no support
2. Jellyfish are poisonous, so it eats them to clean the sea — score 2
3. Jellyfish are mostly water, so they give little food each — ← Mova's choice · ✓ the right answer · score 12
4. It has no stomach, so food passes through fast — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 12, against 2 for the next best. Its support: lesson 31, line 11: «The leatherback is the biggest turtle alive: about 2 m long and over 500 kg, with a tough leathery skin instead of hard plates; it eats jellyfish, which are mo…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «jellyfish» (+5); the same thing acted on «water» (+3); the same property (+2); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · wrong ✗

In a video game your turtle hero swims in a cold sea and keeps its body warm by itself like a dog. Which real turtle comes closest to that?

1. The leatherback, whose huge body stays warm in cold seas — ✓ the right answer · no support
2. No turtle can be in cold water — score 6
3. The box turtle in a garden — ← Mova's choice · score 9
4. The painted turtle under ice — no support

Why: It took the question to ask what it is done to. It chose option 3 with score 9, against 6 for the next best. Its support: lesson 31, line 8: «Tortoises are turtles that live only on land; they have domed shells and stumpy legs, while water turtles have flatter shells and webbed feet or flippers.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «turtles» (+4); it fills the role the question asks for (+3); the same thing acted on «turtles» (+2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 7 · wrong ✗

A fish swims into the open mouth of an alligator snapping turtle. Why?

1. Turtles pull fish in with magnets — ← Mova's choice · score 1
2. It was cleaning the turtle's teeth — no support
3. It wanted to hide from the bigger fish that were chasing it — score -2
4. It took the pink tongue flap for a worm — ✓ the right answer · no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 1, against -2 for the next best. Its support: lesson 31, line 2: «So when a box turtle in the garden pulls in its head and legs and shuts the hinge underneath, it is hiding inside its own ribs, like a house that is also a shi…», reached through the option's own match among the sentences about the question's things. What matched: the same action «pull» (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

Why don't painted turtles drown during months under the ice of a pond?

1. They come up every night through holes that they break in the ice — no support
2. Cold slows their bodies so they need almost no oxygen — ← Mova's choice · ✓ the right answer · score 14
3. They have lungs as big as a whale's — no support
4. They sleep inside a bubble of air — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 14, the only option with support. Its support: lesson 31, line 18: «Painted turtles spend the winter on the muddy bottom of frozen ponds for months, with their hearts beating only a few times a minute, because the cold slows th…», reached through the cause of the sentence the question matched. What matched: the same doer «cold» (+6); the same action «slow» (+4); the same thing acted on «bodies» (+4). · the question and its options parsed, with trees and pragmatics

Test 9 · right ✓

shut up, turtles got teeth, i saw one bite a lettuce. who's right?

1. Turtles have no teeth, they bite with a sharp beak — ← Mova's choice · ✓ the right answer · score 8
2. Only the big sea turtles have real teeth — score 8
3. Turtles have teeth until they are ten — score 8
4. Turtles have teeth, but only on top — score 8

Why: It took the question to ask which statement is true. 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 31, line 20: «Turtles have no teeth but a sharp beak made of keratin, like your nails, and the rings on a tortoise's shell do not give its exact age, because it can grow sev…», reached through the remembered sentence the question matched. What matched: the same thing acted on «teeth» (+4); the same doer «turtles» (+2); the same light verb (be, have, do, get, go) (+2). · the question and its options parsed, with trees and pragmatics

Test 10 · right ✓

Your little cousin wants to let his pet red-eared slider go in the park pond. What is the best answer?

1. Yes, turtles are always much happier in a big pond than in a tank — no support
2. No, released sliders crowd out local pond animals — ← Mova's choice · ✓ the right answer · score 6
3. Yes, it will swim home to its beach — no support
4. No, sliders cannot swim — no support

Why: It took the question to ask what it is done to. It chose option 2 with score 6, the only option with support. Its support: lesson 31, line 21: «Pet red-eared sliders let go in park ponds can crowd out the local pond animals, so pet turtles must never be released.», reached through the same lesson line as the sentence the question matched. What matched: the same action «crowd out» (+2); the same doer «pet eared sliders» (+2); the same receiver «local pond animals» (+2). · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

What would happen if a green turtle's seagrass meadow had no turtles grazing it?

1. The sea would become fresh water — ← Mova's choice · no support
2. Nothing at all would change — no support
3. The seagrass would slowly turn into coral and rock — no support
4. The seagrass would grow less healthy, like an unmown lawn — ✓ 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 12 · wrong ✗

Why does a tortoise need such thick, pillar-like legs?

1. To dig deep tunnels under the sea — ← Mova's choice · no support
2. To hold up a heavy body on dry ground — ✓ the right answer · no support
3. To jump over predators — no support
4. To swim fast like a seal — 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 ✗

Which of the following statements most accurately characterises the relation of a turtle's shell to its skeleton?

1. The shell is acquired from another animal and may be exchanged for a larger one — no support
2. The shell is a detachable covering shed annually — ← Mova's choice · score 13
3. The shell is joined to the ribs and backbone and cannot be removed — ✓ the right answer · score 4
4. The shell is a secretion bearing no relation to the skeleton — score 13

Why: It took the question to ask who or what does it. It chose option 2 with score 13, tied with another option at 13 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 31, line 1: «A turtle's shell is not a coat it can take off: it is part of its skeleton, with the ribs and backbone grown together into the bony plates.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same doer «shell» (+4); the same light verb (be, have, do, get, go) (+2); a different thing acted on (counts against) (+1). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

It is given that the temperature of a sea turtle nest is elevated. Identify the principal consequence for the hatchlings.

1. A greater proportion of females — ← Mova's choice · ✓ the right answer · no support
2. No consequence whatsoever — no support
3. A total failure of hatching — no support
4. A greater proportion of males — 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 · wrong ✗

Identify the means by which the alligator snapping turtle secures its prey.

1. The construction of nets — ← Mova's choice · no support
2. A worm-shaped lure upon the tongue — ✓ the right answer · no support
3. Pursuit at considerable speed — no support
4. The discharge of venom — 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 4 · formal language · wrong ✗

Select the response consistent with the established facts concerning the dentition of turtles.

1. Turtles possess a full set of molars — ← Mova's choice · no support
2. Turtles possess teeth upon the tongue, but none in the jaws — no support
3. Turtles possess no teeth, but a keratinous beak — ✓ the right answer · no support
4. Turtles possess teeth only in youth — no support

Why: Nothing it remembers matched the question, 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/31-turtles-and-tortoises/