Teeth and their care

Tests: 5 of 12 right · Exam: 2 of 4 right · Kind: plain · Understood: 9 of 16 · Run: 2026-10-18, commit f3c23ea72

Lesson 35 of the world 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 ✗

A boy sips a sweet fizzy drink all afternoon. Why is this bad for his teeth?

1. Cold drinks make teeth fall out — ← Mova's choice · score 5
2. The drink fills his cavities with gas — no support
3. The germs keep making acid from the sugar all afternoon — ✓ the right answer · no support
4. The bubbles crack the enamel — no support

Why: It took the question to ask why something happens (its cause). It chose option 1 with score 5, the only option with support. Its support: lesson 35, line 8: «Milk teeth begin to fall out at around age 6 and adult teeth grow in their place.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «milk teeth» (+3); the same action «fall out» (+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 ✗

When you bite into an apple, which teeth do most of the cutting?

1. The roots under the gum — ← Mova's choice · no support
2. The molars at the very back of the mouth — no support
3. The wisdom teeth only — no support
4. The incisors at the front — ✓ 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 3 · wrong ✗

Which is true?

1. Every lost tooth grows back after a year — ← Mova's choice · no support
2. Adult teeth must last for life, because they do not grow back — ✓ the right answer · no support
3. Enamel can feel pain like skin — no support
4. Milk teeth never need brushing — 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 4 · wrong ✗

A girl chews a nut into a paste. Which teeth did the grinding?

1. The milk gums — ← Mova's choice · no support
2. The molars — ✓ the right answer · no support
3. The canines — no support
4. The incisors — 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 · right ✓

What would help teeth most after eating sweets?

1. Biting on ice to harden them — no support
2. Brushing them with fluoride toothpaste — ← Mova's choice · ✓ the right answer · score 4
3. Eating more sweets to cover the old sugar — no support
4. Drinking a sweet juice — no support

Why: It took the question to ask who or what does it. It chose option 2 with score 4, the only option with support. Its support: lesson 35, line 5: «Brushing twice a day with fluoride toothpaste, eating fewer sugary snacks and visiting the dentist keep teeth healthy. A grown-up tooth that is lost does not g…», reached through a sentence linked to the one the question matched. What matched: the same action «brush» (+2); the same circumstance (+2). · the question and its options parsed, with trees and pragmatics

Test 6 · right ✓

Why do dentists say "fewer sugary snacks"?

1. Germs make acid from sugar, and every snack feeds them again — ← Mova's choice · ✓ the right answer · no support
2. Snacks stop saliva for a week — no support
3. Sugar turns enamel into bone — no support
4. Sugar makes teeth grow too big — 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 ✓

A 7-year-old has a wobbly front tooth. What is most likely happening?

1. She will have no teeth there forever — no support
2. It means her bones are breaking — no support
3. A milk tooth is being replaced by an adult tooth — ← Mova's choice · ✓ the right answer · score 8
4. The tooth has turned into a molar — score 2

Why: It took the question to ask which statement is true. It chose option 3 with score 8, against 2 for the next best. Its support: lesson 35, line 2: «Children have 20 milk (baby) teeth. From about age 6 they fall out one by one and are replaced by adult teeth; an adult has 32 teeth.», reached through the same lesson line as the sentence the question matched. What matched: the same action «replace» (+4); the same doer «adult teeth» (+4). · the question and its options parsed, with trees and pragmatics

Test 8 · wrong ✗

What protects the inside of a tooth?

1. A coat of saliva only — no support
2. A thin layer of soft skin over the top — ← Mova's choice · score 8
3. A hard layer of enamel — ✓ the right answer · score 8
4. A thin layer of hair — score 8

Why: It took the question to ask who or what does it. 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 17, line 5: «The layer of air around the Earth, the atmosphere, also keeps us warm and protects us from harmful rays from the Sun.», 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 «layer» (+4). Against it: a different action (counts against) (-1). The right option, 3, scored 8. · the question and its options parsed, with trees and pragmatics

Test 9 · wrong ✗

why do my back teeth look all flat n bumpy

1. They are incisors used for cutting — no support
2. They are molars, made to grind and crush food — ✓ the right answer · no support
3. They are canines, worn flat by tearing — no support
4. They are milk teeth that never grew — ← 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 35, line 5: «Brushing twice a day with fluoride toothpaste, eating fewer sugary snacks and visiting the dentist keep teeth healthy. A grown-up tooth that is lost does not g…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «grown tooth» (+1); the same thing acted on «grown tooth» (+1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics

Test 10 · wrong ✗

sweets dont even touch the tooth inside so how do they rot it

1. Germs turn the sugar into acid that eats the enamel — ✓ the right answer · no support
2. Sugar freezes the teeth and cracks them — no support
3. Sweets make the teeth soft and wet — ← Mova's choice · score 6
4. Sugar is sharp and scratches the teeth — 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 35, line 14: «A hole in a tooth caused by decay is called a cavity.», reached through the remembered sentence the question matched. What matched: the same action «cause» (+4); the same thing acted on «tooth» (+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 ✓

my cousin says if u lose an adult tooth another one grows back. true?

1. No, adult teeth do not grow back — ← Mova's choice · ✓ the right answer · score 8
2. Yes, but only the front teeth grow back — score 5
3. Yes, teeth always grow back every time — score 5
4. No, only the molars grow back, not the rest — no support

Why: It took the question to ask which statement is true. It chose option 1 with score 8, against 5 for the next best. Its support: lesson 35, line 5: «Brushing twice a day with fluoride toothpaste, eating fewer sugary snacks and visiting the dentist keep teeth healthy. A grown-up tooth that is lost does not g…», reached through the same lesson line as the sentence the question matched. What matched: the same action «grow back» (+4); the same doer «grown tooth» (+4). · the question and its options parsed, with trees and pragmatics

Test 12 · right ✓

Ella reckons brushing once a week is fine. right?

1. Yes, if you use lots of toothpaste — no support
2. No, brush twice a day for about two minutes — ← Mova's choice · ✓ the right answer · score 6
3. Yes, once a week is enough — no support
4. No, brush once a month but for much longer each time — 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 35, line 5: «Brushing twice a day with fluoride toothpaste, eating fewer sugary snacks and visiting the dentist keep teeth healthy. A grown-up tooth that is lost does not g…», reached through the remembered sentence the question matched. What matched: the same action «brush» (+4); the same property (+2). · the question and its options parsed, with trees and pragmatics

Exam question 1 · formal language · wrong ✗

State the number of milk teeth possessed by a child.

1. Twenty-eight — ← Mova's choice · no support
2. Thirty-two — no support
3. Twelve — no support
4. Twenty — ✓ 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 2 · formal language · wrong ✗

Identify the teeth whose function is the grinding and crushing of food.

1. The milk teeth alone — ← Mova's choice · no support
2. The canines — no support
3. The molars — ✓ the right answer · no support
4. The incisors — 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 · right ✓

Which of the following statements most accurately characterises enamel?

1. It is the softest layer of the tooth — score 9
2. It is a living tissue that regrows when it is chipped — score 9
3. It is a substance contained in toothpaste — score 9
4. It is the hardest material in the human body — ← Mova's choice · ✓ the right answer · score 15

Why: It took the question to ask who or what does it. It chose option 4 with score 15, against 9 for the next best. Its support: lesson 35, line 12: «Enamel, the outer layer of a tooth, is the hardest material in the body.», 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 (+4); the same doer «enamel» (+3); the same thing acted on «hardest material» (+3); the same light verb (be, have, do, get, go) (+3). · the question and its options parsed, with trees and pragmatics

Exam question 4 · formal language · right ✓

Identify the principal cause of damage to the enamel of the teeth.

1. Acid produced from sugar by germs in the mouth — ← Mova's choice · ✓ the right answer · no support
2. The chewing of raw vegetables — no support
3. The drinking of plain water — no support
4. Excessive brushing with fluoride — 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/world/35-teeth-and-care/