Animal builders: spiders' webs and silk

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

Lesson 244 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 ✓

In Charlotte's Web the spider spins words like «Some Pig» into her web. What can real spiders do?

1. They copy the letters and words they see written on signs and posters — score 6
2. They can only spin straight lines — score 2
3. They write their names in silk — score 8
4. They cannot write, but some weave zigzag decorations into their webs — ← Mova's choice · ✓ the right answer · score 15

Why: It took the question to ask what is done. It chose option 4 with score 15, against 8 for the next best. Its support: lesson 244, line 13: «Real spiders cannot write words, but some weave zigzag silk decorations into their webs, which may warn birds away or attract insects; a spider can make up to…», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «zigzag silk decorations» (+4); the same doer «some» (+3); the same place «webs» (+3); it fills the role the question asks for (+3). · the question and its options parsed, with trees and pragmatics

Test 2 · wrong ✗

«spidey shoots webs out his wrists innit, real spiders do that too right» What is right?

1. Yes, from their mouths — no support
2. No, silk comes from spinnerets at the back of the body — ✓ the right answer · no support
3. Yes, from the tips of their front legs, like threads from a reel — no support
4. No, real spiders cannot make silk at all — ← Mova's choice · score 7

Why: It took the question to ask which statement is true. It chose option 4 with score 7, the only option with support. Its support: lesson 220, line 6: «Spiders make silk in their bodies and spin it out of spinnerets; they make different silks for different jobs, such as sticky threads, strong frame threads and…», reached through the option's own match among the sentences about the question's things. What matched: the same action «make» (+4); the same doer «spiders» (+4); the same thing acted on «silk» (+1). Against it: one says «not», the other does not (counts against) (-2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 3 · wrong ✗

«3 spiders in the bath, how many legs, quick»

1. 30 — ← Mova's choice · no support
2. 12 — no support
3. 18 — no support
4. 24 — ✓ 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 4 · wrong ✗

«there were 4 spiders in the shed, no wait 5. legs?»

1. 32 — ← Mova's choice · no support
2. 40 — ✓ the right answer · no support
3. 20 — no support
4. 45 — 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 · wrong ✗

«4 spiders and 2 flies in the web. how many legs altogether»

1. 48 — ← Mova's choice · no support
2. 36 — no support
3. 40 — no support
4. 44 — ✓ 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 6 · wrong ✗

«my sis says we eat 8 spiders a year in our sleep, gross» What is true?

1. It is true, but only for children — no support
2. There is no evidence for it, it spread without proof — ✓ the right answer · score 3
3. It is true for spiders but not insects — no support
4. It is true, scientists counted them while people slept in labs — ← Mova's choice · score 4

Why: It took the question to ask which statement is true. It chose option 4 with score 4, against 3 for the next best. Its support: lesson 220, line 10: «The idea that people swallow spiders in their sleep is a myth; a sleeping person breathes, snores and has a beating heart, and those vibrations warn spiders aw…», reached through the same lesson line as the sentence the question matched. What matched: the same action «sleep» (+3); the same doer «people» (+1). The right option, 2, scored 3. · the question and its options parsed, with trees and pragmatics

Test 7 · right ✓

What would happen if a spider walked across the sticky spiral of its own web carelessly?

1. The web would turn to water — score 1
2. It could get stuck, which is why it keeps to the dry spokes — ← Mova's choice · ✓ the right answer · score 3
3. The spider would sink through the web — score 3
4. Nothing at all, because every thread of the whole web is dry — no support

Why: It took the question to ask what happens next. It chose option 2 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 147, line 11: «A spider walks on the dry spokes of its web and touches sticky threads carefully with special claws, but it can stick in a stranger's web.», reached through what followed the sentence the question matched. What matched: the same doer «spider» (+3). · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

A tiny spider rises into the air on a still autumn day with no wind. What might be helping it?

1. The Earth's electric field pulling on its silk — ← Mova's choice · ✓ the right answer · score 9
2. Warm water underneath it — no support
3. A bird carrying it in its beak for miles — no support
4. Its tiny hidden wings flapping very fast — no support

Why: It took the question to ask what it is done to. It chose option 1 with score 9, the only option with support. Its support: lesson 147, line 5: «Spiders make silk in glands in the abdomen and pull it out through spinnerets at the back end, not from wrists or legs.», reached through the option's own match among the sentences about the question's things. What matched: the same action «pull out» (+4); the same circumstance (+3); a different doer (counts against) (+2). · the question and its options parsed, with trees and pragmatics

Test 9 · right ✓

Why is spider silk useful to the spider in a sticky web and a stretchy line both?

1. Silk changes by itself with the weather — no support
2. All silk is exactly the same — no support
3. The spider makes different kinds of silk for different jobs — ← Mova's choice · ✓ the right answer · score 2
4. The spider buys silk from other spiders — score 0

Why: It took the question to ask why something happens (its cause). It chose option 3 with score 2, against 0 for the next best. Its support: lesson 220, line 6: «Spiders make silk in their bodies and spin it out of spinnerets; they make different silks for different jobs, such as sticky threads, strong frame threads and…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «different silks» (+2); the same circumstance (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

«that jumpy spider is looking right at me with them big eyes. creepy» What is right?

1. Spiders are completely blind, so those eyes cannot see anything at all — score 6
2. Those are fake eyes painted on its back — no support
3. It is only looking at the light behind you — ← Mova's choice · score 9
4. Jumping spiders really do see well and judge distance with their big front eyes — ✓ the right answer · score 8

Why: It took the question to ask which statement is true. It chose option 3 with score 9, against 8 for the next best. Its support: lesson 148, line 4: «Watch a jumping spider on a windowsill: it turns, looks right at you with two big front eyes, ties on a safety thread and leaps onto a fly many times its own l…», reached through the option's own match among the sentences about the question's things. What matched: the same action «look» (+4); the same doer «spider» (+4); the same circumstance (+1). The right option, 4, scored 8. · the question and its options parsed, with trees and pragmatics

Test 11 · wrong ✗

A trapdoor spider in a zoo is 40 years old. Is that possible?

1. No, every spider dies before its first birthday — ← Mova's choice · score 8
2. Yes, some trapdoor spiders live over 40 years — ✓ the right answer · score 8
3. No, spiders live only a few weeks, even in zoos — score 8
4. Yes, but only if it sleeps through every winter — no support

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 38, line 11: «Spiders stretch their legs out by pumping blood into them, so when a spider dies the pressure is gone and its legs curl underneath it.», reached through the option's own match among the sentences about the question's things. What matched: the same action «die» (+4); the same doer «spider» (+4). The right option, 2, scored 8. · 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 structure of an orb web?

1. It is composed throughout of uniformly adhesive silk — no support
2. It possesses no adhesive element whatsoever — no support
3. It is constructed of fibres collected from plants — ← Mova's choice · score 2
4. It consists of dry radial threads supporting an adhesive spiral — ✓ the right answer · no support

Why: It took the question to ask who or what does it. It chose option 3 with score 2, the only option with support. Its support: lesson 9, line 9: «The Great Barrier Reef off Australia is about 2,300 km long and is the largest structure built by living things.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «largest structure» (+3). Against it: the same action «build» (-1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

Identify the principal means by which a web-building spider ascertains the capture of its prey.

1. Continuous visual observation at great distance — no support
2. The detection of sound carried through the air — no support
3. The assistance of other spiders stationed nearby — no support
4. The perception of vibrations transmitted through the threads — ← 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 244, line 7: «The spider feels vibrations through the threads and can tell where the prey is and how big it is; many web spiders see poorly and read the web like a telephone…», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «vibrations» (+3); the same place «threads» (+2). Against it: a different action (counts against) (-1). · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · wrong ✗

Select the response consistent with the established facts concerning the popular assertion that persons swallow spiders whilst asleep.

1. It has been confirmed by extensive scientific measurement — ← Mova's choice · no support
2. It is restricted to persons residing near forests — no support
3. It occurs solely during the winter months — no support
4. No evidence supports it, and it was disseminated without proof — ✓ 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 4 · formal language · right ✓

Ascertain the manner in which the diving bell spider obtains air whilst living beneath the surface of a pond.

1. It abstains from breathing for the duration of its life — no support
2. It respires through a hollow plant stem fixed above the water at the surface — score 6
3. It extracts air from the water through gills in the manner of a fish — score 8
4. It maintains a tent of silk replenished with air conveyed from the surface — ← Mova's choice · ✓ the right answer · score 9

Why: It took the question to ask which statement is true. It chose option 4 with score 9, against 8 for the next best. Its support: lesson 244, line 12: «The diving bell spider makes a silk tent under water and fills it with air carried from the surface; it is the only spider that lives almost all its life under…», reached through the option's own match among the sentences about the question's things. What matched: the same action «carry» (+4); the same place «surface» (+4); the same thing acted on «air» (+1). · the question and its options parsed, with trees and pragmatics

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