Hair: growing, curly and straight, eyebrows, eyelashes and going grey

Tests: 3 of 11 right · Exam: 1 of 4 right · Kind: ★★ · Understood: 10 of 15 · Run: 2026-10-18, commit f3c23ea72

Lesson 355 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: two upper eyelids with about 100 lashes each. About how many upper lashes is that?

1. About 400 — ← Mova's choice · no support
2. About 200 — ✓ the right answer · no support
3. About 50 — no support
4. About 100 — 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 ✗

If you never cut your hair for a year, about how much longer would it be?

1. About 50 centimetres — ← Mova's choice · score 7
2. About 12 centimetres — ✓ the right answer · score 7
3. About 1 centimetre — score 7
4. About 1 metre — score 4

Why: It took the question to ask what it is done to. 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 71, line 9: «Each hair grows from a follicle in the skin, about 1 centimetre a month; we lose about 50 to 100 hairs a day, and cutting hair does not make it grow back thick…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «hair» (+4); it fills the role the question asks for (+2); the same thing acted on «1 centimetre» (+1). The right option, 2, scored 7. · the question and its options parsed, with trees and pragmatics

Test 3 · ★★ · wrong ✗

Count them: a boy loses about 100 hairs a day. About how many hairs does he lose in a week?

1. About 70,000 — ← Mova's choice · score 7
2. About 100 — score 7
3. About 7 — score 7
4. About 700 — ✓ the right answer · score 7

Why: It took the question to ask what it is done to. 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 71, line 9: «Each hair grows from a follicle in the skin, about 1 centimetre a month; we lose about 50 to 100 hairs a day, and cutting hair does not make it grow back thick…», reached through the remembered sentence the question matched. What matched: the same action «lose» (+4); the same circumstance (+2); a different thing acted on (counts against) (+1). The right option, 4, scored 7. · the question and its options parsed, with trees and pragmatics

Test 4 · ★★ · right ✓

«shaving me legs makes the hair grow back thick and black innit» What is right?

1. Yes, every single shave makes it grow back twice as thick — score 4
2. Yes, but only in summer — no support
3. No, shaved hair never grows back — score 4
4. No, it only looks blunt because it is cut straight across — ← Mova's choice · ✓ the right answer · score 5

Why: It took the question to ask which statement is true. It chose option 4 with score 5, against 4 for the next best. Its support: lesson 71, line 9: «Each hair grows from a follicle in the skin, about 1 centimetre a month; we lose about 50 to 100 hairs a day, and cutting hair does not make it grow back thick…», reached through the same lesson line as the sentence the question matched. What matched: the same action «cut» (+4); the same thing acted on «hair» (+1). · the question and its options parsed, with trees and pragmatics

Test 5 · ★★ · right ✓

In a Tom and Jerry cartoon Tom sees a ghost and his fur turns white in a second. What is the truth?

1. Fright really bleaches fur instantly — no support
2. It happens if the fright is long enough — no support
3. The fur already grown is dead and cannot change colour from a fright — ← Mova's choice · ✓ the right answer · score 6
4. Only cats can turn white from fright — score -1

Why: It took the question to ask which statement is true. It chose option 3 with score 6, against -1 for the next best. Its support: lesson 355, line 15: «The story of hair turning white overnight from a fright is doubted by scientists, because the hair already grown is dead and cannot change colour from inside.», reached through the same lesson line as the sentence the question matched. What matched: the same action «change» (+4); the same thing acted on «colour» (+1); a different doer (counts against) (+1). · the question and its options parsed, with trees and pragmatics

Test 6 · ★★ · wrong ✗

«pulling my hair hurts but the hairdresser cutting it don't, that's weird» Why?

1. Pulling hair breaks bones — score 0
2. Hair has nerves only at the tips — ← Mova's choice · score 3
3. The hairdresser numbs the hair first with a special cream that stops the pain — no support
4. Pulling tugs the living root with nerves; cutting only cuts dead hair — ✓ the right answer · score 2

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 3, against 2 for the next best. Its support: lesson 250, line 7: «Root hairs are tiny tubes near the root tip that greatly increase the surface for taking in water; each lives only a few days, and new ones keep growing near t…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «root hairs» (+1); the same place «root tip» (+1); a different thing acted on (counts against) (+1). The right option, 4, scored 2. · the question and its options parsed, with trees and pragmatics

Test 7 · ★★ · wrong ✗

A girl with straight hair asks why her friend's is curly. What is the best answer?

1. Her friend sleeps with wet hair — no support
2. Her friend's follicles are flat or oval, a shape inherited from her family — ✓ the right answer · no support
3. Her friend's hair is older — no support
4. Her friend eats more crusts — ← Mova's choice · score 2

Why: It took the question to ask what it is done to. It chose option 4 with score 2, the only option with support. Its support: lesson 217, line 4: «Worms are the gardener's best friends: they pull dead leaves down into their burrows, eat them with soil and leave rich crumbly droppings, so a field full of w…», reached through the option's own match among the sentences about the question's things. What matched: the same action «eat» (+1); the same doer «friends» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 8 · ★★ · wrong ✗

Why does hair often get lighter in summer?

1. New hair grows in white because of the heat — ← Mova's choice · score 4
2. Summer air bleaches the roots — no support
3. Sunlight breaks down some of the melanin in the dead hair — ✓ the right answer · score 4
4. Sweat dyes it lighter — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 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 355, line 4: «Hair colour comes from melanin made in the root; when the colour cells slow down and stop, new hairs grow in white, and a head of white and dark hairs mixed lo…», reached through the option's own match among the sentences about the question's things. What matched: the same action «grow» (+2); the same doer «new hairs» (+1); the same place «white» (+1). The right option, 3, scored 4. · the question and its options parsed, with trees and pragmatics

Test 9 · ★★ · wrong ✗

«Grandad's grey cos his hair's dusty from the shed» What is right?

1. Yes, the dust from the shed slowly gets stuck in his hair and makes it grey — ← Mova's choice · no support
2. Grey comes from not washing enough — no support
3. Grey hair grows when the root's colour cells stop making melanin — ✓ the right answer · no support
4. Grey hair is dead and the dark hair is alive — 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 10 · ★★ · wrong ✗

What would happen to sweat on your forehead if you had no eyebrows?

1. More would run straight into your eyes — ✓ the right answer · no support
2. It would run up into your hair — no support
3. It would stop sweating — no support
4. It would turn to steam — ← Mova's choice · score 0

Why: It took the question to ask which statement is true. It chose option 4 with score 0, the only option with support. Its support: lesson 313, line 14: «The beluga's bulgy forehead, the melon, changes shape as it makes sounds, and its seven neck bones are not joined together, so it can nod and turn its head.», reached through the option's own match among the sentences about the question's things. What matched: the same action «turn» (+1); the same doer «forehead» (+1). Against it: a different thing acted on (counts against) (-2). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 11 · ★★ · right ✓

Why does a balloon trick work best on a dry winter day?

1. Dry air lets static charges build up instead of leaking away — ← Mova's choice · ✓ the right answer · no support
2. Winter hair is longer — no support
3. Balloons are bigger in winter — no support
4. Cold air makes each hair lighter, so it lifts up more easily — 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 material of which the visible portion of a hair is composed.

1. Hardened perspiration — ← Mova's choice · no support
2. Keratin, which is dead tissue — ✓ the right answer · no support
3. Living tissue supplied with nerves — no support
4. Dried blood — 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 determinant of the curliness of hair?

1. The shape of the follicle, which is inherited — ← Mova's choice · ✓ the right answer · no support
2. The frequency with which the hair is washed — no support
3. The practice of sleeping with damp hair — no support
4. The quantity of milk consumed in childhood — 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 effect of shaving upon the subsequent growth of hair.

1. Shaving terminates the growth of hair — ← Mova's choice · score 2
2. Shaving darkens the hair permanently — no support
3. Shaving doubles the thickness of the hair — no support
4. Shaving does not render the hair thicker — ✓ the right answer · score 2

Why: It took the question to ask which statement is true. It chose option 1 with score 2, tied with another option at 2 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 355, line 15: «The story of hair turning white overnight from a fright is doubted by scientists, because the hair already grown is dead and cannot change colour from inside.», reached through the option's own match among the sentences about the question's things. What matched: the same action «turn» (+1); the same doer «hair» (+1). The right option, 4, scored 2. · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · wrong ✗

Ascertain the principal cause of the greying of hair.

1. The bleaching of the hair by sunlight over decades — no support
2. The cessation of the production of melanin by pigment cells in the roots — ✓ the right answer · no support
3. The accumulation of dust upon the hair — ← Mova's choice · score 3
4. The drying of the hair in consequence of age — 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 66, line 13: «The nose warms and moistens air, and its hairs and sticky mucus catch dust and germs before they reach the lungs.», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same thing acted on «dust» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/355-hair-growing-curly-and-straight-eyebrows-eyelashes-and-going-grey/