Senses: eyes and ears

Tests: 3 of 11 right · Exam: 2 of 4 right · Kind: ★ · Understood: 8 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 69 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 ✓

bruv eat ur carrots, you'll see in the dark like a cat. true?

1. No, carrots keep eyes healthy but don't give night vision — ← Mova's choice · ✓ the right answer · score 6
2. Yes, ten carrots a day and you see in the dark like a cat — score 1
3. No, carrots make you blind at night — no support
4. Yes, the orange colour glows in your eyes — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 6, against 1 for the next best. Its support: lesson 69, line 12: «Carrots have vitamin A, which the eye needs to see in dim light, but eating extra carrots does not give night vision; the story spread in the Second World War…», reached through the same lesson line as the sentence the question matched. What matched: the same action «give» (+4); the same thing acted on «night vision» (+2). · the question and its options parsed, with trees and pragmatics

Test 2 · ★ · wrong ✗

In a cartoon a bat bumps into everything because «bats are blind». Put it right.

1. Bats really are blind, so in real life they crash all the time — score 5
2. Bats only ever fly in daylight — no support
3. Bats see only with their ears — ← Mova's choice · score 9
4. Bats can see, and many dodge things in the dark by echolocation — ✓ the right answer · score 9

Why: It took the question to ask which statement is true. It chose option 3 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 69, line 13: «Bats are not blind: all bats can see, and many also find insects in the dark by echolocation, making high squeaks and listening for the echoes.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «bats» (+5); the same action «see» (+4). The right option, 4, scored 9. · the question and its options parsed, with trees and pragmatics

Test 3 · ★ · wrong ✗

What would happen if your iris could not change the pupil's size?

1. You would only see in black and white, like an old film on television — ← Mova's choice · no support
2. You could not see at all — no support
3. Bright light would dazzle you and dim light would be harder to see in — ✓ the right answer · no support
4. Nothing, the pupil does not matter — 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 · ★ · right ✓

Ada covers her left eye and moves a paper with a dot and a cross. The cross vanishes. Why?

1. Its picture has landed on her blind spot — ← Mova's choice · ✓ the right answer · no support
2. The cross was rubbed out — no support
3. Her eye has suddenly stopped working for good — no support
4. Her brain is tired of crosses — 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 ✗

My mate says his eyes see everything upside down but his brain flips it. Nonsense?

1. Yes, babies see upside down for ever — no support
2. Yes, it is nonsense: eyes always see everything the right way up from the start — ← Mova's choice · score 5
3. No, it is right: the lens makes an upside-down picture and the brain turns it — ✓ the right answer · score 5
4. Yes, only cameras flip pictures — score 3

Why: It took the question to ask which statement is true. It chose option 2 with score 5, tied with another option at 5 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 38, line 12: «Jumping spiders have two huge front eyes that see sharply and in colour, and they stalk and pounce instead of using webs.», reached through the option's own match among the sentences about the question's things. What matched: the same action «see» (+3); the same doer «two huge front eyes» (+2). The right option, 3, scored 5. · the question and its options parsed, with trees and pragmatics

Test 6 · ★ · wrong ✗

My uncle can't tell the red and green apples apart. What is most likely?

1. His blind spot has grown big enough to hide colours — no support
2. He needs to eat a lot more carrots every day — no support
3. He is colour blind, which is common in men — ✓ the right answer · no support
4. He needs glasses to tell colours apart properly — ← 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 44, line 14: «Mantis shrimps have 12 to 16 kinds of light sensors while we have 3 kinds of colour sensors, yet a 2014 study found they are worse than us at telling close col…», reached through the remembered sentence the question matched. What matched: the same thing acted on «close colours» (+5); the same action «tell» (+2); the same property (+2). Against it: a different doer (counts against) (-3); one says «not», the other does not (counts against) (-4). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 7 · ★ · wrong ✗

shout HELLO in a cave and it comes back a second later. how far is the wall then?

1. About 1 kilometre — ← Mova's choice · no support
2. About 17 metres — no support
3. About 170 metres, as sound goes there and back — ✓ the right answer · no support
4. About 340 metres, because sound only goes one way — 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 8 · ★ · wrong ✗

Why should you wear ear defenders near very loud fireworks or engines?

1. Fireworks blow lots of earwax and smoke deep into your ears and block them — ← Mova's choice · no support
2. Loud sounds can damage hair cells in the ear that do not grow back — ✓ the right answer · no support
3. Ear defenders make you hear better — no support
4. Loud sounds can make your ears fall off — 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 ✓

An owl hunts mice in the dark by sound alone. Why are its two ears useful?

1. One ear is for day and one for night — no support
2. Each ear hears the sound a little differently, giving the direction — ← Mova's choice · ✓ the right answer · score 4
3. Two ears let the owl hear the colours of the mice in the dark — score 1
4. Two ears keep its head balanced — score 3

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 4, against 3 for the next best. Its support: lesson 34, line 11: «A barn owl's face funnels sound to ears set at different heights, so it can find a mouse in total darkness by sound alone.», reached through the cause of the sentence the question matched. What matched: the same thing acted on «sound» (+5); a different doer (counts against) (+1). Against it: a different action (counts against) (-2). · the question and its options parsed, with trees and pragmatics

Test 10 · ★ · wrong ✗

In a game your hero spins round twenty times and walks in a straight line at once. What really happens?

1. He would fly like a top — ← Mova's choice · no support
2. He would walk even faster than before because he is warmed up — no support
3. He would wobble, as fluid in his inner ear keeps swirling — ✓ the right answer · no support
4. Nothing at all happens — 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 11 · ★ · wrong ✗

A mantis shrimp has 16 kinds of colour cells and we have 3. Does it see colours much better than us?

1. Yes, it can read in the dark — no support
2. No, it sees no colours at all — ← Mova's choice · score 8
3. Not exactly: tests suggest it is not better at telling close colours apart — ✓ the right answer · score 8
4. Yes, it sees five times better — score 5

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 44, line 4: «Games and memes call tardigrades indestructible and say mantis shrimps see a rainbow we cannot imagine; the truth is cleverer, because the tardigrade survives…», reached through the remembered sentence the question matched. What matched: the same thing acted on «colours» (+5); the same action «see» (+2); the same doer «mantis shrimp» (+1). The right option, 3, scored 8. · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

Identify the function of the iris in the regulation of vision.

1. It produces tears — ← Mova's choice · no support
2. It perceives colour — no support
3. It adjusts the diameter of the pupil according to the light — ✓ the right answer · no support
4. It forms the inverted image upon the retina at the rear of the eye — 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 ✓

Which of the following statements most accurately characterises the blind spot of the human eye?

1. It is located at the front surface of the eye — no support
2. It is a defect present only in the elderly — score 9
3. It is a region of damage caused by prolonged exposure to bright sunlight — score 9
4. It is the region devoid of light cells where the optic nerve departs — ← Mova's choice · ✓ the right answer · score 11

Why: It took the question to ask who or what does it. It chose option 4 with score 11, against 9 for the next best. Its support: lesson 69, line 8: «Where the optic nerve leaves the eye there are no light cells, so each eye has a small blind spot that the brain usually fills in so we do not notice it.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same doer «optic nerve» (+4); a different action (counts against) (+2). · the question and its options parsed, with trees and pragmatics

Exam question 3 · formal language · right ✓

It is asserted that the consumption of carrots confers vision in darkness. Select the response consistent with the established facts.

1. The assertion is true for children only — no support
2. The assertion is true without qualification — no support
3. The assertion is false, although vitamin A is needed for vision in dim light — ← Mova's choice · ✓ the right answer · score 6
4. The assertion is true of carrots cooked and consumed shortly before nightfall — no support

Why: It took the question to ask which statement is true. It chose option 3 with score 6, the only option with support. Its support: lesson 69, line 12: «Carrots have vitamin A, which the eye needs to see in dim light, but eating extra carrots does not give night vision; the story spread in the Second World War…», reached through the same lesson line as the sentence the question matched. What matched: the same action «need» (+4); the same thing acted on «vitamin» (+2). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the cause of the sensation of dizziness experienced upon ceasing to spin.

1. Blood ceases to reach the eyes — ← Mova's choice · no support
2. The eardrum is displaced — no support
3. The cochlea is temporarily filled with air — no support
4. Fluid within the inner ear continues to move — ✓ 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

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/69-senses-eyes-and-ears/