Snakes to keep away from: cobras, mambas, vipers and rattlesnakes
Tests: 4 of 11 right · Exam: 3 of 4 right · Kind: ★ · Understood: 8 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 322 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 ✗
«black mamba's black innit, it's in the name» What is the truth?
- 1. No, it is see-through — ← Mova's choice · no support
- 2. It is grey or olive-brown; the black is the inside of its mouth — ✓ the right answer · no support
- 3. Yes, black as coal from nose to tail, which helps it hide at night — no support
- 4. No, it is bright green — 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 2 · ★ · wrong ✗
In a cowboy film a rattlesnake buzzes before it strikes. What is the buzz really for?
- 1. Telling the time — ← Mova's choice · no support
- 2. Scaring mice out of holes — no support
- 3. Calling other snakes to help — no support
- 4. Warning big animals not to step on it — ✓ 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 3 · ★ · right ✓
«my bro says count a rattler's rings and you get its age» What is the best answer?
- 1. Yes, it grows exactly one new ring on its birthday every year — score 6
- 2. No, it adds a ring each time it sheds, several times a year — ← Mova's choice · ✓ the right answer · score 12
- 3. No, rings show how many mice it ate — no support
- 4. Yes, but only for female snakes — no support
Why: It took the question to ask what it is done to. It chose option 2 with score 12, against 6 for the next best. Its support: lesson 322, line 10: «A rattlesnake's rattle is a stack of loose hollow rings made of the same stuff as your fingernails, and it adds a ring each time it sheds, several times a year…», reached through a sentence linked to the one the question matched. What matched: the same action «add» (+5); it fills the role the question asks for (+4); the same thing acted on «ring» (+3); the same property (+1). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 4 · ★ · wrong ✗
In a film the hero sucks the venom from his friend's bite. What should he do instead?
- 1. Put ice on it and wait a day — no support
- 2. Tie a band as tight as he can — no support
- 3. Cut the bite open first with a clean knife, then suck the venom out — ← Mova's choice · score 7
- 4. Keep the friend calm and still and get help fast for antivenom — ✓ the right answer · no support
Why: It took the question to ask what is done. It chose option 3 with score 7, the only option with support. Its support: lesson 246, line 18: «If a snake is on a path, stand still or back away slowly, because snakes bite mostly when trapped or stepped on; if someone is bitten, keep them still and get…», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «bite» (+3); it fills the role the question asks for (+2); the same action «cut» (+1); one says «not», the other does not (counts against) (+1). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 5 · ★ · wrong ✗
Count them: a museum has 4 viper skulls, each with two long front fangs. How many long fangs is that?
- 1. 16 — ← Mova's choice · no support
- 2. 6 — no support
- 3. 4 — no support
- 4. 8 — ✓ 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 · ★ · right ✓
Count them: 3 cobras rise up in a basket. How many hoods, legs and outer ears?
- 1. 3 hoods, no legs and no outer ears — ← Mova's choice · ✓ the right answer · no support
- 2. 6 hoods, no legs and 6 ears — no support
- 3. 3 hoods, 6 legs and no ears — no support
- 4. 3 hoods, 12 legs and 6 outer ears — 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 The Jungle Book Rikki-Tikki-Tavi the mongoose fights two cobras that spread their hoods. What does a real spread hood mean?
- 1. «I am about to fall asleep» — no support
- 2. «I want to be friends» — no support
- 3. «I am hungry for fruit» — no support
- 4. «I am big, leave me alone» — ← Mova's choice · ✓ the right answer · score 5
Why: It took the question to ask who or what does it. It chose option 4 with score 5, the only option with support. Its support: lesson 322, line 6: «A cobra lifts the front of its body and spreads long ribs in its neck to stretch the skin into a hood, a warning that says «I am big, leave me alone».», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+3); the same doer «warning» (+2). · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · wrong ✗
«adder on the path sunbathing, gonna poke it with a stick to move it» What should he do?
- 1. Leave it, step back and go round it — ✓ the right answer · score 5
- 2. Throw stones until it leaves — ← Mova's choice · score 12
- 3. Pick it up by the tail — score 3
- 4. Poke it gently with a long stick, adders like it — score 5
Why: It took the question to ask what is done. It chose option 2 with score 12, against 5 for the next best. Its support: lesson 182, line 8: «The sidewinder snake moves sideways and touches the hot sand at only two points, leaving J-shaped tracks.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «sidewinder snake» (+5); it fills the role the question asks for (+4); the same action «leave» (+3). The right option, 1, scored 5. · the question and its options parsed, with trees and pragmatics
Test 9 · ★ · right ✓
What would happen if all the snakes vanished from a farm?
- 1. Crops would grow twice as fast — no support
- 2. Rats might grow in number and spoil more grain — ← Mova's choice · ✓ the right answer · score 10
- 3. Nothing at all would change — no support
- 4. All the rats would leave too, because rats follow the snakes — score 2
Why: It took the question to ask what happens next. It chose option 2 with score 10, against 2 for the next best. Its support: lesson 322, line 17: «Most snakes hunt rats, mice, frogs or insects and keep away from people, and snakes help farmers by eating rats that spoil grain.», reached through what followed the sentence the question matched. What matched: the same action «spoil» (+6); the same thing acted on «grain» (+3); the same doer «rats» (+1). · the question and its options parsed, with trees and pragmatics
Test 10 · ★ · wrong ✗
Why does a spitting cobra aim at the eyes and not the legs?
- 1. Venom in the eyes hurts and blinds an attacker quickly — ✓ the right answer · no support
- 2. Legs are too far for it to see — no support
- 3. It is aiming at the ears really — no support
- 4. It wants to clean the attacker's eyes — ← Mova's choice · score 4
Why: It took the question to ask why something happens (its cause). It chose option 4 with score 4, the only option with support. Its support: lesson 260, line 18: «You blink about 15 to 20 times a minute to wet and clean your eyes, the brain hides each dark moment, and staring at screens makes people blink less.», reached through the option's own match among the sentences about the question's things. What matched: the same action «clean» (+3); the same thing acted on «eyes» (+1); a different doer (counts against) (+1). Against it: one says «not», the other does not (counts against) (-1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 11 · ★ · wrong ✗
«snake in the garden, it's probably harmless, can i pick it up» What is the best answer?
- 1. Yes, but only if it hisses — no support
- 2. No, never touch a wild snake; leave it and tell an adult — ✓ the right answer · score 2
- 3. Yes, if you grab it by the tail — no support
- 4. Yes, all garden snakes are harmless, so it is fine to hold one — ← Mova's choice · score 3
Why: It took the question to ask which statement is true. It chose option 4 with score 3, against 2 for the next best. Its support: lesson 158, line 15: «Some harmless snakes copy the red, black and yellow bands of the deadly coral snake, so predators avoid both, and it is not safe to guess which is which.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «harmless snakes» (+2); the same property (+1). The right option, 2, scored 2. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · right ✓
Identify the function of the hood displayed by a cobra.
- 1. It constitutes a warning that deters a potential attacker — ← Mova's choice · ✓ the right answer · no support
- 2. It enables the animal to glide between trees when pursued by an enemy — no support
- 3. It is employed in the incubation of eggs — no support
- 4. It serves to capture flying insects — 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 · right ✓
Select the response consistent with the established facts concerning the treatment of a person bitten by a venomous snake.
- 1. The person is kept calm and still, and medical assistance providing antivenom is sought without delay — ← Mova's choice · ✓ the right answer · score 4
- 2. An incision is made across the wound, the venom is extracted by suction and a tight ligature is applied above the bite — no support
- 3. The venom is extracted by suction from the wound — no support
- 4. A tight ligature is applied above the bite — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 4, the only option with support. Its support: lesson 322, line 14: «If someone is bitten, sucking, cutting, ice and tight bands do not help; keep the person calm and still, take off rings and watches, and get help at once, beca…», reached through the option's own match among the sentences about the question's things. What matched: the same action «keep» (+3); the same property (+1). · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · wrong ✗
Which of the following statements most accurately characterises the behaviour of a cobra before a snake charmer?
- 1. It is asleep and sways involuntarily — ← Mova's choice · no support
- 2. It responds with evident pleasure to the music and moves in time to it — no support
- 3. It follows the movement of the pipe as though it were a threat — ✓ the right answer · no support
- 4. It performs a dance learnt from its keeper — 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 approximate proportion of snake species that are seriously dangerous to human beings.
- 1. About two hundred out of some four thousand species — ← Mova's choice · ✓ the right answer · no support
- 2. No species whatsoever — no support
- 3. Every species without exception — no support
- 4. About three thousand out of some four thousand species — 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/322-snakes-to-keep-away-from-cobras-mambas-vipers-and-rattlesnakes/