The Chornobyl zone: how wild animals came back, and what is still argued
Tests: 6 of 12 right · Exam: 2 of 4 right · Kind: ★★★ · Understood: 11 of 16 · Run: 2026-10-18, commit f3c23ea72
Lesson 376 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 ✗
Count them: a video game shows a three-headed wolf from the zone. How many heads has a real Chornobyl wolf?
- 1. 0 — ← Mova's choice · no support
- 2. 1 — ✓ the right answer · no support
- 3. 2 — no support
- 4. 3 — 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 ✗
Count them: a camera trap shows 2 elk and 3 boar. How many legs?
- 1. 15 — ← Mova's choice · no support
- 2. 20 — ✓ the right answer · no support
- 3. 25 — no support
- 4. 10 — 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 · ★★★ · wrong ✗
Count them: about 30 horses were let go in 1998 and now there are over 100. By how many times did they grow, at least?
- 1. 2 times — ← Mova's choice · score 13
- 2. 30 times — score 13
- 3. More than 3 times — ✓ the right answer · score 13
- 4. 100 times, one for every horse — score 13
Why: It took the question to ask what it is done to. It chose option 1 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 96, line 7: «Farm sheep grow wool all the time and must be shorn every year, because people bred them to keep their wool; a sheep called Shrek in New Zealand escaped sheari…», reached through the remembered sentence the question matched. What matched: the same action «grow» (+5); the same property (+3); a different thing acted on (counts against) (+3); the same doer «farm sheep» (+2). The right option, 3, scored 13. · the question and its options parsed, with trees and pragmatics
Test 4 · ★★★ · right ✓
«chornobyl = dead zone, nothing lives there» What is right?
- 1. Only mutant monsters with extra legs and eyes live there — no support
- 2. It is a desert with no life of any kind — no support
- 3. Only plants live there — no support
- 4. Wolves, elk, boar, lynx, bears and horses live there — ← Mova's choice · ✓ the right answer · score -3
Why: It took the question to ask which statement is true. It chose option 4 with score -3, the only option with support. Its support: lesson 373, line 18: «Wild horses called tarpans lived on the Ukrainian steppe until the 1800s and saigas until a few hundred years ago; hunting and ploughing drove them away.», reached through the remembered sentence the question matched. Against it: the same doer «wild horses» (-3). · the question and its options parsed, with trees and pragmatics
Test 5 · ★★★ · right ✓
«radiation must be GOOD for animals then, look how many» What is the careful answer?
- 1. Yes, radiation makes animals bigger — score 0
- 2. Yes, radiation makes animals healthy and lets them have more babies than usual — score 4
- 3. Radiation has no effect at all — no support
- 4. Radiation harms living things; animals do well mostly because people are gone — ← Mova's choice · ✓ the right answer · score 14
Why: It took the question to ask what it is done to. It chose option 4 with score 14, against 4 for the next best. Its support: lesson 376, line 3: «Radiation still harms living things in the worst spots, and scientists argue how much. Both things can be true: radiation hurts animals, yet people being gone…», reached through the same lesson line as the sentence the question matched. What matched: the same action «harm» (+5); the same doer «radiation» (+4); it fills the role the question asks for (+3); the same thing acted on «living things» (+2). · the question and its options parsed, with trees and pragmatics
Test 6 · ★★★ · right ✓
How could two careful studies of the zone seem to disagree?
- 1. Radiation changes the numbers on cameras — no support
- 2. Animals hide from one team only — no support
- 3. One of the scientists must be lying about what he saw there — no support
- 4. One looks at the worst spots, the other at the whole zone — ← Mova's choice · ✓ the right answer · score 5
Why: It took the question to ask what something is like. It chose option 4 with score 5, the only option with support. Its support: lesson 276, line 13: «About 540 million years ago many kinds of animals with eyes, shells and legs appeared fairly quickly in the fossil record; this is called the Cambrian explosio…», reached through the remembered sentence the question matched. What matched: the same action «appear» (+5). · the question and its options parsed, with trees and pragmatics
Test 7 · ★★★ · wrong ✗
What would happen to a road if nobody used it for 40 years?
- 1. It would turn into a river — ← Mova's choice · score 7
- 2. It would stay brand new — no support
- 3. Plants would crack it and a forest would grow over it — ✓ the right answer · score 7
- 4. It would sink into the ground at once and leave a long deep hole — no support
Why: It took the question to ask what happens next. 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 376, line 1: «In 1986 a reactor at the Chornobyl power plant in Ukraine exploded and spread radiation, and people had to leave a large area around it. Picture a town where n…», reached through what followed the sentence the question matched. What matched: the same action «grow» (+6); a different doer (counts against) (+1). The right option, 3, scored 7. · the question and its options parsed, with trees and pragmatics
Test 8 · ★★★ · right ✓
«there's dogs at chornobyl, they look friendly, i'll cuddle one» What is wiser?
- 1. They are wolves in disguise — score 2
- 2. They are still strange animals, so do not touch them — ← Mova's choice · ✓ the right answer · score 3
- 3. They glow, so wear thick gloves and then hug them — score 2
- 4. They are tame pets, so cuddle away — score 3
Why: It took the question to ask which statement is true. 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 325, line 7: «Dogs are pack animals and should not be left alone for more than about four hours; some dogs left too long bark, howl or chew out of worry.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «pack animals» (+2); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics
Test 9 · ★★★ · right ✓
Why would a deep-digging animal like a boar carry more radiation than a grazing deer?
- 1. It eats underground fungi that pile up caesium — ← Mova's choice · ✓ the right answer · score 0
- 2. Deer wear thicker fur that keeps the radiation out — no support
- 3. Boar drink more rain — no support
- 4. Boar are born radioactive — score 0
Why: It took the question to ask why something happens (its cause). It chose option 1 with score 0, tied with another option at 0 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 368, line 17: «Animals that learn fast and eat almost anything do best in cities, and scientists have found many city animals are bolder than their country cousins.», reached through the option's own match among the sentences about the question's things. · the question and its options parsed, with trees and pragmatics
Test 10 · ★★★ · right ✓
What would happen to a forest floor if nothing rotted the leaves?
- 1. The leaves would turn back into trees — no support
- 2. Dead leaves would pile up and feed fewer new plants — ← Mova's choice · ✓ the right answer · score 0
- 3. The forest would grow faster than ever before — no support
- 4. The leaves would fly away in the wind — no support
Why: It took the question to ask what happens next. It chose option 2 with score 0, the only option with support. Its support: lesson 156, line 4: «Cartoons show sloths as lazy jokers and toucans as cereal-box clowns; the real reasons are better: leaves give a sloth very little energy, and a toucan's huge…», reached through the option's own match among the sentences about the question's things. What matched: the same action «give» (+1). Against it: a different thing acted on (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 11 · ★★★ · wrong ✗
Why might darker skin have helped tree frogs after the accident?
- 1. Dark frogs ate the radiation — score 2
- 2. Dark frogs are harder for radiation to find because it cannot see them — score 4
- 3. Dark skin keeps frogs cold — ← Mova's choice · score 8
- 4. Melanin may protect from some harm, so dark frogs had more babies — ✓ the right answer · score 5
Why: It took the question to ask why something happens (its cause). It chose option 3 with score 8, against 5 for the next best. Its support: lesson 353, line 6: «Skin keeps water in and germs out and helps keep your temperature right; it is thinnest on the eyelids and thickest on the soles of the feet.», reached through the same lesson line as the sentence the question matched. What matched: the same action «keep» (+6); the same doer «skin» (+2). The right option, 4, scored 5. · the question and its options parsed, with trees and pragmatics
Test 12 · ★★★ · wrong ✗
In a film a girl drinks from a river in the zone and becomes a superhero. What is right?
- 1. River water there is clean and special — ← Mova's choice · no support
- 2. Radiation harms the body and gives no powers — ✓ the right answer · no support
- 3. Radiation gives powers to children only — no support
- 4. Superpowers come from caesium — 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 principal reason for which populations of large mammals have increased within the Chornobyl exclusion zone.
- 1. A beneficial influence of radiation upon their health and their fertility — no support
- 2. The absence of hunting, agriculture and traffic following the evacuation — ✓ the right answer · no support
- 3. A marked warming of the regional climate — no support
- 4. The deliberate feeding of animals by the authorities — ← Mova's choice · 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 47, line 2: «When your well-fed pet cat drops a mouse on the kitchen floor, it is not hungry and not giving you a present on purpose: the urge to stalk and pounce is built…», reached through the option's own match among the sentences about the question's things. What matched: the same action «give» (+1). Against it: one says «not», the other does not (counts against) (-3). The right option, 2, found no support in what it remembers. · 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 Red Forest.
- 1. It was so named on account of the great numbers of red foxes which reside within it — ← Mova's choice · no support
- 2. Its pines were killed by radiation and turned red-brown; younger trees have since grown — ✓ the right answer · no support
- 3. It was painted red to serve as a warning — no support
- 4. Its trees bear red flowers throughout the year — 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 ✓
Which of the following statements most accurately characterises the radioactivity of wild boar in Germany?
- 1. It persists because boar consume subterranean fungi which accumulate radioactive caesium — ← Mova's choice · ✓ the right answer · no support
- 2. It derives from grass alone — no support
- 3. It arises because the boar migrated from Ukraine across Poland in great numbers after 1986 — no support
- 4. It has entirely disappeared since 1990 — 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 which of the following assertions concerning animals of the zone is in accordance with scientific evidence.
- 1. Animals of the zone emit visible light — score 2
- 2. All animals of the zone are sterile — no support
- 3. The animals observed today are of normal appearance, and no giant mutants exist — ← Mova's choice · ✓ the right answer · score 3
- 4. Wolves bearing several heads are frequently observed by the rangers of the zone — score -1
Why: It took the question to ask which statement is true. It chose option 3 with score 3, against 2 for the next best. Its support: lesson 285, line 10: «Wild animals should be watched and photographed, not taken home: a pond frog can die in a tank, and moving frogs between ponds spreads disease.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «wild animals» (+2); the same action «watch» (+1). · the question and its options parsed, with trees and pragmatics
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/376-the-chornobyl-zone-how-wild-animals-came-back-and-what-is-still-argued/