Forests: woodland through the year and the great northern forest

Tests: 6 of 11 right · Exam: 1 of 4 right · Kind: ★ · Understood: 10 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 12 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 ✗

Granddad says leaves go red because frost paints them. right?

1. No, the rain washes the green away — no support
2. Yes, frost colours the leaves overnight — no support
3. No, the green is broken down and red colours are made fresh — ✓ the right answer · no support
4. Yes, without frost the leaves would stay green all through the winter — ← Mova's choice · score 1

Why: It took the question to ask which statement is true. It chose option 4 with score 1, the only option with support. Its support: lesson 2, line 10: «Green algae grow in a sloth's fur and help to hide it among the leaves.», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same property (+1). Against it: a different action (counts against) (-2). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

Ella counts 47 rings on a tree stump. About how old was the tree when it was cut?

1. About 94 years — ← Mova's choice · no support
2. About 47 years — ✓ the right answer · no support
3. About 470 years — no support
4. About 4 years — 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 ✓

What would happen if no squirrel or jay ever forgot an acorn?

1. Nothing, oaks never grow from acorns, only from cuttings — score 0
2. Oak trees would grow much faster than before — score 2
3. Squirrels would starve in winter — score 4
4. Fewer new oaks would grow far from the old trees — ← Mova's choice · ✓ the right answer · score 6

Why: It took the question to ask what happens next. It chose option 4 with score 6, against 4 for the next best. Its support: lesson 12, line 7: «Grey squirrels bury nuts in many separate spots and find many by memory and smell, but the acorns they and jays forget can grow into new oak trees.», reached through what followed the sentence the question matched. What matched: the same action «grow» (+4); the same circumstance (+4). Against it: a different doer (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 4 · ★ · right ✓

A beech wood is dark all summer. Why are the bluebells already finished by then?

1. Summer is too cold for them — no support
2. They flower early while light still reaches the ground — ← Mova's choice · ✓ the right answer · score 4
3. They only flower every other year — score 4
4. Squirrels eat all the flowers in June and dig up the bulbs — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, tied with another option at 4 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 12, line 8: «Bluebells grow from bulbs and flower in April and May, before the trees above are fully in leaf, because that is when sunlight still reaches the forest floor;…», reached through the option's own match among the sentences about the question's things. What matched: the same action «flower» (+2); the same doer «bluebells» (+2). · the question and its options parsed, with trees and pragmatics

Test 5 · ★ · wrong ✗

In a cartoon, an owl spins its head round and round like a wheel. What is wrong?

1. Nothing, owls can spin their heads round for ever — no support
2. Owls turn their eyes, not their heads, like we do — ← Mova's choice · score 6
3. Owls cannot turn their heads at all — score 0
4. Owls turn their heads only up to about 270 degrees — ✓ the right answer · score 6

Why: It took the question to ask which statement is true. It chose option 2 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 12, line 15: «The twit-twoo call is usually two tawny owls: one calls kee-wick and another answers hoo-hooo; owls cannot move their eyes, so they turn their heads, up to abo…», reached through the remembered sentence the question matched. What matched: the same doer «owls» (+4); the same thing acted on «eyes» (+4). Against it: a different action (counts against) (-2). The right option, 4, scored 6. · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · right ✓

oi found a massive mushroom in the woods, gonna fry it for tea

1. No, never eat wild mushrooms, some are deadly — ← Mova's choice · ✓ the right answer · no support
2. Yes, big ones are always safe to eat — no support
3. Yes, if it smells nice it is fine — no support
4. Only if a squirrel has bitten it first — 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 ✓

Sam saw a hedgehog wandering about in January in the snow. What is likely?

1. It has woken from hibernation and is in trouble, so tell an adult or rescue group — ← Mova's choice · ✓ the right answer · score 5
2. It is migrating south for the winter — score 0
3. It is looking for flowers to eat — no support
4. Hedgehogs always go for walks in winter — score 2

Why: It took the question to ask which statement is true. It chose option 1 with score 5, against 2 for the next best. Its support: lesson 12, line 14: «Hedgehogs feed up in autumn, then hibernate in a nest of leaves, and their heart slows from about 190 beats a minute to about 20; a hedgehog wandering about in…», reached through the same lesson line as the sentence the question matched. What matched: the same action «wake» (+3); the same thing acted on «hedgehog» (+2). · the question and its options parsed, with trees and pragmatics

Test 8 · ★ · wrong ✗

A moose has 4 legs, 2 ears and 1 heart. How many legs do 3 moose have?

1. 6 — ← Mova's choice · no support
2. 16 — no support
3. 8 — 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 9 · ★ · right ✓

My mate says the taiga is a tropical jungle full of monkeys. right?

1. Yes, it is in the middle of Africa, near the equator — no support
2. Yes, it is the Amazon's other name — no support
3. No, it is a hot, dry desert full of camels and cactuses — no support
4. No, it is the cold northern forest of spruce, pine and larch — ← Mova's choice · ✓ the right answer · score 8

Why: It took the question to ask which statement is true. It chose option 4 with score 8, the only option with support. Its support: lesson 12, line 10: «The taiga, or boreal forest, is mostly spruce, pine, fir and larch, and it is the biggest land habitat on Earth, nearly a third of all the world's forest.», reached through the remembered sentence the question matched. What matched: the same doer «taiga» (+4); the same circumstance (+4); the same light verb (be, have, do, get, go) (+2). Against it: a different thing acted on (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · right ✓

Why would beard lichen disappear from a forest near a new smoky factory?

1. The noise scares it away — no support
2. It takes water and food straight from the air, so dirty air kills it — ← Mova's choice · ✓ the right answer · score 7
3. Factories cut down all the lichen for paper — no support
4. Lichen only grows in the dark, and the factory lights shine on it all night long — no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 7, the only option with support. Its support: lesson 12, line 16: «Lichen, like old man's beard, is not a plant but a fungus and a tiny green alga living together; beard lichens take water and food straight from the air, so th…», reached through the same lesson line as the sentence the question matched. What matched: the same action «take» (+3); the same thing acted on «water» (+2); the same place «air» (+2). · the question and its options parsed, with trees and pragmatics

Test 11 · ★ · wrong ✗

In a game, a woodpecker gets a headache after pecking. In real life, why can it drum all day?

1. It pecks very slowly so that it does not hurt its head at all — ← Mova's choice · score 1
2. It only pecks once a year — score 1
3. Its body is built for it and it drums for its living — ✓ the right answer · score 1
4. It wears soft moss on its beak like a cushion — score -1

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 1, tied with another option at 1 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 12, line 9: «A great spotted woodpecker drums on dead wood up to about 20 times a second to mark its territory, and its very long tongue wraps around the back of its skull.», reached through the cause of the sentence the question matched. What matched: the same doer «great spotted woodpecker» (+3). Against it: a different action (counts against) (-2). The right option, 3, scored 1. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Identify the principal reason for which the leaves of deciduous trees acquire yellow and orange hues in autumn.

1. The decomposition of chlorophyll reveals pigments previously concealed — ← Mova's choice · ✓ the right answer · no support
2. The leaves are scorched by the accumulated summer sunshine — no support
3. The action of frost deposits new pigments upon the surface of the leaf — no support
4. The leaves absorb colour from the surrounding soil — 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 · wrong ✗

Ascertain the approximate age of a tree whose felled trunk exhibits sixty annual rings.

1. Approximately six hundred years — ← Mova's choice · no support
2. Approximately six years — no support
3. Approximately one hundred and twenty years — no support
4. Approximately sixty years — ✓ 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 3 · formal language · wrong ✗

Which of the following statements most accurately characterises the boreal forest, hereinafter the taiga?

1. It is composed principally of oak and beech — no support
2. It is the most extensive terrestrial habitat, dominated by coniferous trees — ✓ the right answer · no support
3. It is a tropical forest situated at the equator — no support
4. It is the smallest of the forests of the northern hemisphere, confined to a single country — ← Mova's choice · score 7

Why: It took the question to ask who or what does it. It chose option 4 with score 7, the only option with support. Its support: lesson 12, line 4: «Far to the north lies the biggest forest on land, the taiga, a dark green belt of spruce, pine, fir and larch across Canada, Scandinavia and Russia, where snow…», 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 «biggest forest» (+2); the same circumstance (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Select the response consistent with the established facts concerning the hibernation of the hedgehog.

1. The hedgehog remains active throughout the winter but abstains from food of every kind — ← Mova's choice · score 0
2. The rate of the heartbeat diminishes from about 190 to about 20 per minute — ✓ the right answer · no support
3. The heart ceases to beat entirely until the spring — no support
4. The heartbeat is accelerated to generate warmth — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 0, the only option with support. Its support: lesson 12, line 3: «Every animal has its own trick for the cold months: the squirrel buries acorns, the hedgehog sleeps through winter in a nest of leaves, the owl keeps hunting i…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «hedgehog» (+1); the same property (+1). Against it: a different action (counts against) (-2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

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