The Arctic: ice, snow and the polar bear's world
Tests: 2 of 11 right · Exam: 2 of 4 right · Kind: plain · Understood: 8 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 6 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 frozen sven eats carrots so reindeer live on carrots» What is right?
- 1. Yes, carrots are their main food — no support
- 2. Yes, and they pull carrots out of the frozen ground with their antlers — score 4
- 3. No, reindeer eat only fish — score 6
- 4. No, wild reindeer dig through snow for lichen and graze plants — ← Mova's choice · ✓ the right answer · score 12
Why: It took the question to ask which statement is true. It chose option 4 with score 12, against 6 for the next best. Its support: lesson 6, line 5: «In Frozen, Sven the reindeer begs for carrots; real reindeer dig through the snow with their broad hooves to eat lichen, and unlike other deer, both the males…», reached through the remembered sentence the question matched. What matched: the same action «dig» (+4); the same doer «real reindeer» (+4); the same place «snow» (+4). · the question and its options parsed, with trees and pragmatics
Test 2 · wrong ✗
«girl reindeer don't have antlers, only santa's boys do» What is right?
- 1. Right: only males have antlers, and they use them to pull the sleigh — score 4
- 2. Right: no reindeer has antlers — ← Mova's choice · score 8
- 3. Wrong: in reindeer both males and females usually grow antlers — ✓ the right answer · score 8
- 4. Wrong: only females have antlers — score 4
Why: It took the question to ask which statement is true. It chose option 2 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 6, line 5: «In Frozen, Sven the reindeer begs for carrots; real reindeer dig through the snow with their broad hooves to eat lichen, and unlike other deer, both the males…», reached through the remembered sentence the question matched. What matched: the same doer «sven» (+4); the same thing acted on «antlers» (+4). The right option, 3, scored 8. · the question and its options parsed, with trees and pragmatics
Test 3 · wrong ✗
«lemmings all jump off cliffs, saw it in an old film» What is right?
- 1. True: they really think that they can fly — no support
- 2. A myth: that 1958 film faked the scene — ✓ the right answer · no support
- 3. True: they all do it every single winter — ← Mova's choice · score 3
- 4. True, but only young lemmings do it in spring — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 3, the only option with support. Its support: lesson 6, line 16: «Lemmings spend the winter in tunnels under the snow, which traps air like a blanket; the story that they jump off cliffs together is a myth helped by a faked 1…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «lemmings» (+2); the same property (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 4 · right ✓
«the narwhal's a real unicorn innit» What is right?
- 1. No, its tusk is a long tooth, though old traders sold it as unicorn horn — ← Mova's choice · ✓ the right answer · no support
- 2. Yes, its horn grows from its forehead, just like a unicorn's in a fairy tale — no support
- 3. No, the tusk is made of ice — no support
- 4. Yes, it is a unicorn that lives in the sea — 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
Test 5 · wrong ✗
Count them: a walrus with 2 tusks and three narwhal males with 1 tusk each. How many tusks?
- 1. 4 — ← Mova's choice · no support
- 2. 6 — no support
- 3. 5 — ✓ the right answer · 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 6 · wrong ✗
What would happen to an Arctic fox that stayed white all summer on brown tundra?
- 1. It would turn into a snowy owl — ← Mova's choice · score 8
- 2. Nothing, white is invisible everywhere — no support
- 3. It would stay cooler in the sun and catch more food — score 6
- 4. Its prey and predators would spot it more easily — ✓ the right answer · no support
Why: It took the question to ask which statement is true. It chose option 1 with score 8, against 6 for the next best. Its support: lesson 6, line 8: «The Arctic fox sleeps with its bushy tail over its nose, has small ears, short legs and very thick fur, and turns white in winter and brown or grey in summer,…», reached through the remembered sentence the question matched. What matched: the same action «turn» (+4); the same doer «arctic fox» (+4). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 7 · wrong ✗
«polar bear's white so its skin's white under, obviously» What is right?
- 1. Yes, white skin and white hair, all over — ← Mova's choice · no support
- 2. No, its skin is striped — no support
- 3. No, its skin is black and its hairs are see-through — ✓ the right answer · no support
- 4. No, its skin is pink like a pig's — 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
Test 8 · wrong ✗
«why do musk oxen just stand in a circle like idiots when wolves come» Which is the best answer?
- 1. They are too slow to do anything else but stand — ← Mova's choice · no support
- 2. They are counting the wolves — no support
- 3. The wall of horns protects the calves in the middle — ✓ the right answer · no support
- 4. They are trying to look bigger to each other — 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 ✗
«snow's freezing, how come lemmings live in it all winter» Which is the best answer?
- 1. Lemmings cannot feel cold — no support
- 2. They sleep all winter in deep caves under the mountains, far from the snow — ← Mova's choice · score 9
- 3. Snow traps air and works like a blanket, warmer than the wind above — ✓ the right answer · score 9
- 4. They eat the snow to keep warm — score 5
Why: It took the question to ask what something is like. It chose option 2 with score 9, tied with another option at 9 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 6, line 16: «Lemmings spend the winter in tunnels under the snow, which traps air like a blanket; the story that they jump off cliffs together is a myth helped by a faked 1…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+6); the same doer «lemmings» (+3); the same property (+2). Against it: a different action (counts against) (-2). The right option, 3, scored 9. · the question and its options parsed, with trees and pragmatics
Test 10 · wrong ✗
«sun at 11 at night?? norway's broken lol» Which is the best answer?
- 1. The northern lights are so bright that they make it look like the sun is still up — ← Mova's choice · no support
- 2. The Earth's tilt keeps the far north in sunlight all day in midsummer — ✓ the right answer · no support
- 3. The sun stops moving in summer — no support
- 4. Norway is closer to the sun — 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
Test 11 · wrong ✗
«whale that lives 200 years? pull the other one» What is right?
- 1. No whale lives longer than 20 years — ← Mova's choice · score 6
- 2. Only whales in zoos and aquariums live that long, with vets — no support
- 3. All whales live exactly 100 years — score 6
- 4. Some bowhead whales are thought to have lived over 200 years — ✓ the right answer · 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 6, line 17: «The bowhead whale can smash through ice about 60 cm thick with its head to make a hole to breathe, has blubber up to about 50 cm thick, and some are thought to…», reached through the remembered sentence the question matched. What matched: the same action «live» (+4); the same property (+2). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · right ✓
Which of the following statements most accurately characterises the skin and fur of the polar bear?
- 1. The skin of the polar bear is pink and its hairs are white — no support
- 2. The skin and the hairs of the polar bear are alike white, the animal being white throughout — no support
- 3. The skin of the polar bear is black, whereas its hairs are translucent and merely appear white by the scattering of light — ← Mova's choice · ✓ the right answer · score 7
- 4. The polar bear possesses no fur whatsoever — no support
Why: It took the question to ask who or what does it. It chose option 3 with score 7, the only option with support. Its support: lesson 6, line 6: «Polar bears hunt seals from the sea ice and swim well, kept warm by fat up to about 10 cm thick; their skin is black and their hairs are see-through, only look…», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+3); the same doer «skin» (+2); the same property (+1); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics
Exam question 2 · formal language · wrong ✗
Identify the principal reason for which the Sun remains visible at a late hour in northern Norway during midsummer.
- 1. The clocks of Norway are improperly adjusted — ← Mova's choice · no support
- 2. The Sun approaches nearer to Norway during summer than to any other country of Europe — no support
- 3. The axis of the Earth is inclined, whereby the far north is directed towards the Sun — ✓ the right answer · no support
- 4. Norway is situated nearer to the Sun than any other country — 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 ✗
Select the response consistent with the established facts concerning the alleged mass suicide of lemmings.
- 1. Lemmings leap from cliffs in great numbers each winter — ← Mova's choice · no support
- 2. Lemmings leap from cliffs only in years of abundance, when their numbers exceed the food — no support
- 3. The notion is a myth, reinforced by a film of 1958 in which the scene was contrived — ✓ the right answer · no support
- 4. The phenomenon has been observed by every Arctic explorer — 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
Exam question 4 · formal language · right ✓
Ascertain the defensive conduct of musk oxen upon the approach of wolves.
- 1. The calves are concealed in burrows excavated beneath the snow — no support
- 2. The herd disperses in every direction — no support
- 3. The herd forms a ring with horns directed outward and the calves enclosed within — ← Mova's choice · ✓ the right answer · score 5
- 4. Each animal lies motionless upon the snow — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 5, the only option with support. Its support: lesson 6, line 14: «When wolves come, musk oxen form a ring with horns out and calves in the middle, and their woolly underfur, qiviut, is said to be about eight times warmer than…», reached through the same lesson line as the sentence the question matched. What matched: the same action «form» (+2); the same thing acted on «ring» (+2); the same circumstance (+2). Against it: a different doer (counts against) (-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/6-the-arctic/