Nails, sweat and smells: smelly feet, armpits and bad breath

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

Lesson 356 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 family of four people. How many nails do they have in all?

1. 100 — ← Mova's choice · no support
2. 40 — no support
3. 80 — ✓ the right answer · no support
4. 20 — 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 boy paints a dot at the base of his thumbnail. Nails grow about 3 mm a month. How far up has the dot moved after 2 months?

1. About 1 mm — ← Mova's choice · no support
2. About 2 cm — no support
3. About 6 mm — ✓ the right answer · no support
4. About 3 mm — 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 ✗

«me feet stink, means I'm dirty inside» What is right?

1. No, the smell comes from your socks only — ← Mova's choice · no support
2. No, bacteria on the skin eat sweat and make the smell — ✓ the right answer · no support
3. Yes, smelly feet mean you are ill — no support
4. Yes, the smell comes from deep inside your body and leaks out — 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 · wrong ✗

«brushed me teeth twice after the garlic bread, why do I still stink» What is the truth?

1. Garlic comes out through the lungs from the blood, so brushing cannot stop it — ✓ the right answer · no support
2. Garlic is stuck behind the teeth — ← Mova's choice · score 8
3. He did not brush long enough — no support
4. Toothpaste makes garlic smell stronger — score 4

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 8, against 4 for the next best. Its support: lesson 352, line 9: «Brush twice a day for about two minutes with fluoride toothpaste, then spit but do not rinse, so the fluoride stays on the teeth; fluoride makes enamel stronge…», reached through the same lesson line as the sentence the question matched. What matched: the same action «stay» (+5); the same place «teeth» (+3). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 5 · wrong ✗

In a cartoon a skunk's smell is shown as a green cloud, and Tom's sweaty socks make flowers wilt and flies drop dead. What is the truth about sweaty socks?

1. Sweaty socks can kill small animals — ← Mova's choice · score 4
2. The smell is from bacteria and is unpleasant, but it does not kill flowers or flies — ✓ the right answer · no support
3. Sock smell really is green and poisonous — no support
4. The smell comes from the socks themselves, not from bacteria — score 2

Why: It took the question to ask what it is done to. It chose option 1 with score 4, against 2 for the next best. Its support: lesson 239, line 13: «The old story that science proves bumblebees cannot fly came from a wrong simple calculation; bees beat their wings very fast and make swirls of air that lift…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same thing acted on «old story» (+2). 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

Test 6 · wrong ✗

«my little brother farts like 15 times a day, is he ill» What is right?

1. Yes, more than once a day means illness — ← Mova's choice · no support
2. About 10 to 20 times a day is normal — ✓ the right answer · no support
3. No, children never fart that much — no support
4. Yes, only grown-ups fart — 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 · wrong ✗

What would most likely happen if you sipped water and brushed your tongue every morning?

1. Morning breath would be less smelly — ✓ the right answer · no support
2. You would stop making saliva — ← Mova's choice · score 3
3. Your teeth would turn white overnight — no support
4. Your tongue would grow back thicker — score -2

Why: It took the question to ask what happens next. It chose option 2 with score 3, against -2 for the next best. Its support: lesson 356, line 12: «At night you make less saliva, so bacteria on the teeth and tongue grow and make smelly gases, which is morning breath; brushing the tongue and drinking water…», reached through the same lesson line as the sentence the question matched. What matched: the same action «make» (+2); the same thing acted on «less saliva» (+1). The right option, 1, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 8 · right ✓

«older cousin pongs and he showers every day, why» Which is the most likely reason?

1. New armpit glands since puberty make sweat that bacteria love — ← Mova's choice · ✓ the right answer · no support
2. He sweats only on his feet — no support
3. He must be ill with something serious that makes his whole body smell — no support
4. His shower water is dirty — 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 ✗

Why do toenails take longer to grow out than fingernails?

1. Toenails grow backwards — ← Mova's choice · score 3
2. Toenails grow more slowly — ✓ the right answer · score 3
3. Toenails stop growing in winter — score 3
4. Toenails are much longer — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 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 71, line 8: «Nails are made of keratin, like hair and rhino horn; the part you cut has no nerves, and fingernails grow about 3 millimetres a month while toenails grow only…», 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 «toenails» (+1). The right option, 2, scored 3. · the question and its options parsed, with trees and pragmatics

Test 10 · right ✓

Mum cuts a toenail into a deep curve at the corner, and a week later the toe is red and sore. What has probably happened?

1. The toe has a bruise from the scissors — no support
2. The nail edge has grown into the skin — ← Mova's choice · ✓ the right answer · score 6
3. The toe is broken — no support
4. The nail has fallen off — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 6, the only option with support. Its support: lesson 356, line 17: «Cutting toenails straight across helps stop ingrown toenails, where the edge grows into the skin and can get sore and infected.», reached through the option's own match among the sentences about the question's things. What matched: the same place «skin» (+4); the same action «grow» (+1); the same doer «edge» (+1). · the question and its options parsed, with trees and pragmatics

Test 11 · right ✓

«dogs can smell when you're ill, it's all made up» What is fairest to say?

1. Dogs smell only food, never people — score 2
2. Dogs cannot smell people at all — score 2
3. It is fully proven that dogs can sniff out every illness — score 5
4. Trained dogs have been reported in research to sniff out some illnesses — ← 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, against 5 for the next best. Its support: lesson 356, line 16: «Dogs can smell sweat and skin smells we cannot notice, each person has their own smell, and trained dogs have been reported in research to sniff out some illne…», reached through the same lesson line as the sentence the question matched. What matched: the same action «report» (+4); its «because» matches the remembered cause (+2); the same thing acted on «trained dogs» (+1); the same place «research» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · right ✓

Identify the principal cause of the odour associated with perspiring feet.

1. The perspiration as it is first secreted — no support
2. The action of bacteria which consume the perspiration — ← Mova's choice · ✓ the right answer · score 2
3. The toenails as they age — no support
4. The decomposition of the stockings — no support

Why: It took the question to ask which statement is true. It chose option 2 with score 2, the only option with support. Its support: lesson 236, line 7: «There is no good evidence that elephants fear mice; like us, they may be startled by any small thing moving suddenly near their feet.», reached through the option's own match among the sentences about the question's things. What matched: the same action «move» (+1); the same doer «small thing» (+1). · the question and its options parsed, with trees and pragmatics

Exam question 2 · formal language · right ✓

State the aggregate number of nails ordinarily possessed by one person.

1. Twenty — ← Mova's choice · ✓ the right answer · no support
2. Ten — no support
3. Twenty-four — no support
4. Eighteen — 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 persistence of odour subsequent to the consumption of garlic?

1. The odour is generated by the toothpaste — ← Mova's choice · no support
2. The odour is retained solely upon the surface of the teeth — no support
3. The garlic continues to grow within the stomach — no support
4. Substances derived from garlic pass into the blood and are exhaled by the lungs — ✓ 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 4 · formal language · right ✓

Select the response consistent with the established facts concerning the manner in which toenails are properly to be cut.

1. They are to be cut straight across — ← Mova's choice · ✓ the right answer · score 3
2. They are to be cut in a deep curve at the corners — score 3
3. They are to be cut to a sharp point — score 3
4. They are to be cut as short as practicable — score 3

Why: It took the question to ask which statement is true. It chose option 1 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 83, line 2: «In the elephant house the floor is deep, warm sand instead of concrete, because an animal as heavy as several cars gets sore feet and joints on hard ground, an…», reached through the remembered sentence the question matched. What matched: the same thing acted on «toenails» (+3). · the question and its options parsed, with trees and pragmatics

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/356-nails-sweat-and-smells-smelly-feet-armpits-and-bad-breath/