Lungs, air and keeping fit
Tests: 5 of 13 right · Exam: 4 of 4 right · Kind: ★ · Understood: 10 of 17 · Run: 2026-10-18, commit f3c23ea72
Lesson 93 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 ✗
Two children run the same race. One's pulse is back to normal in 2 minutes, the other's in 10 minutes. Which is probably fitter?
- 1. They are exactly as fit — ← Mova's choice · no support
- 2. The one who recovers in 10 minutes — no support
- 3. Pulse tells nothing about fitness — no support
- 4. The one who recovers in 2 minutes — ✓ 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 2 · ★ · wrong ✗
Which is true?
- 1. We breathe out only carbon dioxide — ← Mova's choice · no support
- 2. Nitrogen is what our cells need most — no support
- 3. The air is mostly oxygen — no support
- 4. We breathe out some oxygen as well as carbon dioxide — ✓ the right answer · 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 3 · ★ · right ✓
Put your hands on your ribs and breathe in deeply. What do you feel?
- 1. Nothing moves at all — no support
- 2. The ribs move in and down — no support
- 3. The ribs move up and out — ← Mova's choice · ✓ the right answer · score 7
- 4. The ribs move only when you breathe out — no support
Why: It took the question to ask what it is done to. It chose option 3 with score 7, the only option with support. Its support: lesson 93, line 2: «To breathe in, the diaphragm under your lungs tightens and moves down and your ribs move up and out; the chest gets bigger and air rushes in. When they relax,…», reached through the option's own match among the sentences about the question's things. What matched: the same action «move up» (+5); the same doer «ribs» (+2). · the question and its options parsed, with trees and pragmatics
Test 4 · ★ · wrong ✗
A footballer trains high in the mountains for weeks. Why might this help?
- 1. Mountains have weaker gravity, so running is much easier — ← Mova's choice · score 5
- 2. Her body gets used to working with less oxygen — ✓ the right answer · no support
- 3. The mountain air has extra oxygen — no support
- 4. Cold air makes her lungs bigger — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 5, the only option with support. Its support: lesson 44, line 13: «The Rocky Mountains run north to south through the western United States.», reached through the option's own match among the sentences about the question's things. What matched: the same action «run» (+3); the same doer «rocky mountains» (+2). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 5 · ★ · wrong ✗
After a day in a smoky city, Ana coughs up mucus with dark specks in it. What were the specks?
- 1. Old red blood cells that came up from the heart — ← Mova's choice · no support
- 2. Oxygen that has turned dark — no support
- 3. Bits of the lungs themselves — no support
- 4. Dust and smoke specks trapped by the airways — ✓ 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 6 · ★ · wrong ✗
Why does a person with asthma find it hard to blow out candles?
- 1. Their lungs make far too much oxygen to blow — ← Mova's choice · no support
- 2. Narrow airways let less air in and out — ✓ the right answer · no support
- 3. Candles need lots of carbon dioxide to burn — no support
- 4. Their diaphragm is much too strong to control — 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 ✗
If someone never exercises, what usually happens to their heart and muscles?
- 1. They become stronger anyway — no support
- 2. They become weaker — ✓ the right answer · no support
- 3. They stop using oxygen — ← Mova's choice · score 4
- 4. They grow bigger with rest — no support
Why: It took the question to ask what happens next. It chose option 3 with score 4, the only option with support. Its support: lesson 93, line 4: «When you run, your muscles need much more oxygen, so you breathe faster and deeper and your heart beats faster to carry it. Regular exercise makes the heart st…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «muscles» (+4); the same thing acted on «more oxygen» (+1). Against it: a different action (counts against) (-1). The right option, 2, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · right ✓
Why are you still breathing hard for a short while after you stop running?
- 1. Your body is still catching up on the oxygen it needs — ← Mova's choice · ✓ the right answer · score 3
- 2. Your lungs are full of nitrogen — no support
- 3. Your heart has stopped for a moment and needs to restart — no support
- 4. Running has made your lungs smaller — no support
Why: It took the question to ask why something happens (its cause). It chose option 1 with score 3, the only option with support. Its support: lesson 40, line 15: «High on mountains each breath holds less oxygen, so climbers breathe harder.», reached through the cause of the sentence the question matched. What matched: the same thing acted on «less oxygen» (+4). Against it: a different action (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 9 · ★ · wrong ✗
Why is smoking especially bad for a runner?
- 1. It stops the heart from beating faster — ← Mova's choice · no support
- 2. It gives the lungs too much oxygen — no support
- 3. It makes the legs too heavy — no support
- 4. It damages the lungs so less oxygen reaches the muscles — ✓ the right answer · 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 10 · ★ · right ✓
why am I puffing so hard after running
- 1. You need to breathe out all the oxygen — no support
- 2. Running makes the air thinner — no support
- 3. You breathe faster and deeper to get more oxygen to your muscles — ← Mova's choice · ✓ the right answer · score 6
- 4. Your lungs get smaller when you run — 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 93, line 4: «When you run, your muscles need much more oxygen, so you breathe faster and deeper and your heart beats faster to carry it. Regular exercise makes the heart st…», reached through the same lesson line as the sentence the question matched. What matched: the same action «breathe» (+3); its «because» matches the remembered cause (+2); the same property (+1). · the question and its options parsed, with trees and pragmatics
Test 11 · ★ · right ✓
why's it harder to breathe up a big mountain
- 1. The cold freezes your lungs — no support
- 2. The mountain pulls the air downhill — no support
- 3. The air is thinner, so each breath brings less oxygen — ← Mova's choice · ✓ the right answer · score 4
- 4. The air up there has no oxygen at all, only nitrogen gas — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 4, the only option with support. Its support: lesson 93, line 15: «High up on mountains the air is thinner, so each breath brings in less oxygen.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «air» (+2); the same property (+1); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics
Test 12 · ★ · wrong ✗
Ava says we breathe out only carbon dioxide and no oxygen. true?
- 1. No, breathed-out air has more oxygen than air in — ← Mova's choice · no support
- 2. Yes, all the oxygen stays in the body — no support
- 3. No, breathed-out air has less oxygen and more carbon dioxide — ✓ the right answer · no support
- 4. Yes, breathed-out air is pure carbon dioxide — 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 13 · ★ · right ✓
my mate reckons air is mostly oxygen. right?
- 1. No, air is nearly four fifths nitrogen and one fifth oxygen — ← Mova's choice · ✓ the right answer · score 3
- 2. Yes, air is mostly oxygen — score 3
- 3. No, air is mostly carbon dioxide — score 3
- 4. Yes, air is about half oxygen — 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 93, line 6: «Air is about one fifth oxygen and nearly four fifths nitrogen.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «air» (+2); the same light verb (be, have, do, get, go) (+1). · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · right ✓
Ascertain the proportion of oxygen in the air.
- 1. About one fifth — ← Mova's choice · ✓ the right answer · no support
- 2. About four fifths — no support
- 3. About one tenth — no support
- 4. About one half — 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 breathed-out air in comparison with breathed-in air?
- 1. It contains less oxygen and more carbon dioxide — ← Mova's choice · ✓ the right answer · score 8
- 2. It is identical in composition — no support
- 3. It contains more oxygen and less carbon dioxide — score 8
- 4. It contains no oxygen whatsoever — score 8
Why: It took the question to ask which statement is true. It chose option 1 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 93, line 7: «Breathed-out air contains less oxygen and more carbon dioxide than breathed-in air.», reached through the same lesson line as the sentence the question matched. What matched: the same action «contain» (+3); the same doer «breathed air» (+3); the same thing acted on «less oxygen» (+2). · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · right ✓
Identify the action by which air is drawn into the lungs.
- 1. The diaphragm tightens and moves down, enlarging the chest — ← Mova's choice · ✓ the right answer · score 6
- 2. The heart pumps air into the lungs — score 2
- 3. The diaphragm relaxes and moves up, shrinking the chest — no support
- 4. The stomach pushes air upwards into the lungs — score 2
Why: It took the question to ask which statement is true. It chose option 1 with score 6, against 2 for the next best. Its support: lesson 93, line 2: «To breathe in, the diaphragm under your lungs tightens and moves down and your ribs move up and out; the chest gets bigger and air rushes in. When they relax,…», reached through the same lesson line as the sentence the question matched. What matched: the same action «tighten» (+3); the same doer «diaphragm» (+3). · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · right ✓
Select the response that is consistent with the established facts concerning breathing high upon mountains.
- 1. Each breath brings in less oxygen, the air being thinner — ← Mova's choice · ✓ the right answer · score 4
- 2. The air contains no oxygen above the clouds — no support
- 3. Breathing is identical at every height — no support
- 4. Each breath brings in more oxygen, the air being cleaner — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 4, the only option with support. Its support: lesson 50, line 3: «High in the mountains it is colder, even though you are a little closer to the Sun: sunlight warms the ground, the ground warms the air, and air that rises exp…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «air» (+3); the same property (+1). · the question and its options parsed, with trees and pragmatics
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/world/93-lungs-air-keeping-fit/