Tiny champions: the strongest beetle, the highest-jumping flea and the leggiest millipede

Tests: 7 of 12 right · Exam: 1 of 4 right · Kind: ★★★ · Understood: 10 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 365 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 ✗

«a dung beetle pulls over a thousand times its weight, so a person-sized one would pull six buses lol» What is true?

1. Yes, a big beetle would be even stronger for its size — ← Mova's choice · score 7
2. Yes, all big animals are as strong as beetles — score 5
3. No, if it grew to our size its weight would grow much faster than its strength — ✓ the right answer · score 4
4. No, beetles have no muscles at all — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 7, against 5 for the next best. Its support: lesson 365, line 8: «Small animals are strong for their size because muscle strength grows with how thick a muscle is, but weight grows with the whole body; some ants can hold abou…», reached through the same lesson line as the sentence the question matched. What matched: the same circumstance (+3); the same light verb (be, have, do, get, go) (+2); the same property (+1); a different doer (counts against) (+1). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Test 2 · ★★★ · right ✓

In a monster film, a giant ant the size of a bus chases a city. What would really happen to an ant that big?

1. It could lift 50 buses at once, because ants get stronger as they get bigger — score 1
2. Its legs could hardly hold up its huge weight — ← Mova's choice · ✓ the right answer · score 2
3. It would be even faster than now — score 1
4. It could jump over skyscrapers — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 2, against 1 for the next best. Its support: lesson 36, line 11: «Many ants can lift 10 to 50 times their own weight, because small animals are strong for their size; an ant blown up to the size of a person could hardly hold…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «own weight» (+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 · ★★★ · right ✓

Count them: a girl finds a centipede with 15 pairs of legs. How many legs is that?

1. 30 — ← Mova's choice · ✓ the right answer · no support
2. 45 — no support
3. 15 — no support
4. 100 — 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: three millipede sections each have two pairs of legs. How many legs on those three sections?

1. 3 — ← Mova's choice · no support
2. 24 — no support
3. 6 — no support
4. 12 — ✓ 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 5 · ★★★ · right ✓

«my mate found a centipede with exactly 50 pairs of legs» Why should you doubt him?

1. All centipedes have exactly 1,000 legs — score 1
2. Centipedes always have an odd number of pairs, and 50 is even — ← Mova's choice · ✓ the right answer · score 4
3. Centipedes only have 4 pairs — score 1
4. Centipedes have no legs, they slide — score 1

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, against 1 for the next best. Its support: lesson 3, line 5: «In cartoons a centipede always has exactly 100 legs and wears 100 shoes; a real centipede never has exactly 100 legs, because it always has an odd number of pa…», reached through the option's own match among the sentences about the question's things. What matched: the same property (+2); a different thing acted on (counts against) (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · ★★★ · wrong ✗

Why does a flea need a spring and not just strong muscles?

1. Fleas have no muscles at all anywhere in their bodies — ← Mova's choice · no support
2. Springs are lighter than legs — no support
3. A spring lets go its energy faster than any muscle could — ✓ the right answer · no support
4. A spring helps it fly — 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 7 · ★★★ · right ✓

In a cartoon, Jerry lifts a huge piano over his head and throws it at Tom. Which is true about tiny animals and lifting?

1. Small animals are strong for their size, but a mouse still cannot lift a piano — ← Mova's choice · ✓ the right answer · score 5
2. Mice can lift anything many times bigger than a house — no support
3. Strength does not depend on size at all — no support
4. Mice are weaker than ants for their size — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 5, the only option with support. Its support: lesson 365, line 8: «Small animals are strong for their size because muscle strength grows with how thick a muscle is, but weight grows with the whole body; some ants can hold abou…», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+3); the same property (+1); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics

Test 8 · ★★★ · wrong ✗

Why might a soft young froghopper want to hide in froth?

1. To keep itself warm when snow falls in the middle of summer — ← Mova's choice · no support
2. To catch small flies in it like a web — no support
3. To help the plant it sits on grow faster — no support
4. To hide from hunters and stay damp — ✓ 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 9 · ★★★ · wrong ✗

Why would a tiger beetle run in short bursts instead of one long sprint?

1. It only likes running downhill, and has to stop at the bottom of every slope — ← Mova's choice · score 8
2. It must stop to see again, because its eyes cannot keep up — ✓ the right answer · score 8
3. Sand makes it slow down — no support
4. It runs out of legs — score 2

Why: It took the question to ask why something happens (its cause). 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 185, line 9: «The tiger beetle runs so fast for its size that its eyes cannot keep up, so it stops to look again; for its size it is faster than a cheetah.», reached through the same lesson line as the sentence the question matched. What matched: the same action «stop» (+6); the same doer «beetle» (+2). The right option, 2, scored 8. · the question and its options parsed, with trees and pragmatics

Test 10 · ★★★ · right ✓

«insects are just small, nothing tiny is a record breaker» Which tiny animal breaks the record for body lengths a second?

1. No tiny animal, only the cheetah — score 5
2. The elephant on the savannah — score 6
3. The tortoise, slow but steady — score 6
4. A tiny mite in California — ← Mova's choice · ✓ the right answer · score 7

Why: It took the question to ask what it is done to. It chose option 4 with score 7, against 6 for the next best. Its support: lesson 365, line 15: «A tiny mite in California covers about 300 body lengths a second, more than any other animal measured.», 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 circumstance (+1). · the question and its options parsed, with trees and pragmatics

Test 11 · ★★★ · right ✓

Why might ordinary flat wings not work for a fairyfly smaller than a speck of dust?

1. At that size air feels thick like syrup, so it rows with hairy wings — ← Mova's choice · ✓ the right answer · score 2
2. Flat wings are only for birds — no support
3. Fairyflies live underwater — no support
4. Flat wings are too heavy for any insect — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 2, the only option with support. Its support: lesson 365, line 18: «Fairyflies have feathery wings of a stalk and long hairs and row through the air almost as if it were syrup.», reached through the cause of the sentence the question matched. What matched: the same doer «air» (+2). · the question and its options parsed, with trees and pragmatics

Test 12 · ★★★ · right ✓

Why would an elephant never be as strong for its size as a beetle?

1. Elephants are lazy — score 2
2. Elephants have weaker bones than beetles — score 3
3. Its huge weight grows faster than its muscle strength — ← Mova's choice · ✓ the right answer · score 10
4. Elephants never use their muscles, so they get weaker — score 5

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 10, against 5 for the next best. Its support: lesson 148, line 15: «Small animals are strong for their size, but a spider blown up to human size would struggle to hold up its own weight, because weight grows much faster than mu…», reached through the same lesson line as the sentence the question matched. What matched: the same action «grow» (+6); the same doer «weight» (+2); the same property (+2). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the principal reason for which small animals are capable of lifting loads many times their own weight.

1. Muscular strength increases with the cross-section of muscle, whereas weight increases with the whole volume — ✓ the right answer · no support
2. Small animals consume exceptionally nourishing food — ← Mova's choice · score 2
3. Small animals are devoid of any skeleton — no support
4. Small animals possess a greater number of muscles than large animals — score 2

Why: It took the question to ask which statement is true. It chose option 2 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 343, line 5: «Meat is the muscle of an animal that was killed for food; in Britain the law says animals at an abattoir must usually be made unconscious first so they do not…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «animal» (+2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · wrong ✗

Which of the following statements most accurately characterises the leaping of the cat flea?

1. The flea employs its wings to rise into the air — ← Mova's choice · no support
2. Energy is stored in an elastic pad and released suddenly in the manner of a catapult — ✓ the right answer · no support
3. The leap is effected solely by large muscles of the legs — no support
4. The flea is propelled by currents of air — 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 ✓

Select the response consistent with the established facts concerning the number of legs possessed by centipedes.

1. Every centipede possesses in excess of one thousand legs — no support
2. The number of pairs is invariably odd, so that no centipede possesses exactly one hundred legs — ← Mova's choice · ✓ the right answer · score 2
3. The number of pairs is invariably even — no support
4. Every centipede possesses exactly one hundred legs — score 2

Why: It took the question to ask which statement is true. It chose option 2 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 220, line 18: «Despite their name, no centipede has exactly one hundred legs, and most millipedes have far fewer than a thousand.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «hundred legs» (+2). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

State the number of legs possessed by the millipede discovered in a deep drill hole in Australia in the year 2020.

1. Ten thousand — ← Mova's choice · no support
2. One hundred — no support
3. One thousand three hundred and six — ✓ the right answer · no support
4. Seven hundred and fifty, the same as every millipede — 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/365-tiny-champions-the-strongest-beetle-the-highest-jumping-flea-and-the-leggiest-millipede/