Swimming is not breathing underwater

Tests: 2 of 5 right · Exam: 1 of 3 right · Kind: ★ · Understood: 7 of 8 · Run: 2026-11-05, commit 610eccd1d

Lesson 406 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.

Test 1 · ★ · right ✓

A zoo sign identifies a swimming animal as a mammal. Which breathing organ does that identification point to?

1. Fins that store spare oxygen — no support
2. Gills that take oxygen from water — score 5
3. Lungs that take oxygen from air — ← Mova's choice · ✓ the right answer · score 6
4. Skin that replaces all breathing — score 4

Why: It took the question to ask who or what does it. It chose option 3 with score 6, against 5 for the next best. Its support: lesson 406, line 3: «Real rats are mammals and use lungs to take oxygen from air. Their blood carries that oxygen to body cells, just as the earlier lessons on lungs and circulatio…», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «oxygen» (+4); the same action «take» (+2); the same place «air» (+1). Against it: a different doer (counts against) (-1).

Test 2 · ★ · wrong ✗

A drawing shows a dog swimming. What follows from the fact that a real dog is a mammal?

1. It has lungs that use air — ✓ the right answer · no support
2. Its need for oxygen has stopped — ← Mova's choice · score 5
3. It has become a fish — no support
4. It obtains oxygen through its tail — score 3

Why: It took the question to ask who or what does it. It chose option 2 with score 5, against 3 for the next best. Its support: lesson 406, line 3: «Real rats are mammals and use lungs to take oxygen from air. Their blood carries that oxygen to body cells, just as the earlier lessons on lungs and circulatio…», reached through the same lesson line as the sentence the question matched. What matched: the same circumstance (+4); the same action «take» (+2). Against it: a different doer (counts against) (-1). The right option, 1, found no support in what it remembers.

Test 3 · ★ · wrong ✗

Why can swimming alone not tell us that an animal has gills?

1. Water prevents movement — no support
2. Swimming always replaces breathing — ← Mova's choice · score 2
3. All swimmers are the same kind — no support
4. Swimmers may have lungs or gills — ✓ the right answer · no support

Why: It took the question to ask why something happens (its cause). It chose option 2 with score 2, the only option with support. Its support: lesson 204, line 1: «People joke that a goldfish forgets everything after three seconds, so swimming round a bowl is always a new adventure. It is a myth: goldfish can learn tricks…», reached through the option's own match among the sentences about the question's things. What matched: the same property (+3). Against it: the same doer «swimming» (-1). The right option, 4, found no support in what it remembers.

Test 4 · ★ · wrong ✗

A learner says Rat's tale proves that real rats breathe water through gills. What is the best correction?

1. Fiction does not alter real rat anatomy — ✓ the right answer · no support
2. The claim is correct because Rat entered a brook — no support
3. The story proves that lungs work exactly like gills — no support
4. Every animal in a brook has the same organs — ← Mova's choice · score 6

Why: It took the question to ask what it is done to. It chose option 4 with score 6, the only option with support. Its support: lesson 406, line 4: «Ask which breathing organs an animal has before drawing a conclusion from where it moves. The story is a reading example, not an activity to copy in water.», reached through the remembered sentence the question matched. What matched: the same light verb (be, have, do, get, go) (+3); it fills the role the question asks for (+2); the same doer «animal» (+1). The right option, 1, found no support in what it remembers.

Test 5 · ★ · right ✓

A mammal's blood has just received oxygen in its lungs. Where can that blood take the oxygen next?

1. Toward cells elsewhere in the body — ← Mova's choice · ✓ the right answer · score 6
2. Into the fur to become waterproof — no support
3. Only back into the surrounding air — score 6
4. Into gills that appear during swimming — no support

Why: It took the question to ask where. It chose option 1 with score 6, tied with another option at 6 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 406, line 3: «Real rats are mammals and use lungs to take oxygen from air. Their blood carries that oxygen to body cells, just as the earlier lessons on lungs and circulatio…», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+4); the same place «body cells» (+2); the same action «carry» (+1). Against it: the same doer «blood» (-1).

Exam question 1 · formal language · wrong ✗

Which statement correctly distinguishes a locomotor observation from a respiratory conclusion?

1. Every animal below the water has changed into a fish — ← Mova's choice · no support
2. Swimming is movement; breathing organs need separate evidence — ✓ the right answer · no support
3. Seeing an animal swim proves that it has gills — no support
4. A swimmer does not require gas exchange — no support

Why: No option found support in what it remembers, so it guessed: it took the first option shown.

Exam question 2 · formal language · right ✓

A real animal is reliably identified as a rat. Which proposed description conflicts with that identification?

1. It has a vertebrate skeleton — no support
2. Its blood carries oxygen to cells — score 3
3. It has fish gills instead of lungs — ← Mova's choice · ✓ the right answer · score 7
4. It obtains oxygen from air — score 2

Why: It took the question to ask who or what does it. It chose option 3 with score 7, against 3 for the next best. Its support: lesson 406, line 1: «In Where Animals Talk, Rat dives into a brook and works on logs under the water. That is a fictional event, not evidence that real rats have gills.», reached through the option's own match among the sentences about the question's things. What matched: the same light verb (be, have, do, get, go) (+4); the same thing acted on «gills» (+2); it fills the role the question asks for (+1).

Exam question 3 · formal language · wrong ✗

A diagram shows air spaces and blood vessels side by side in a mammal's lung. Which exchange should it show?

1. Oxygen entering the blood as carbon dioxide leaves — ✓ the right answer · score 4
2. Blood releasing oxygen into the outgoing air — ← Mova's choice · score 7
3. Water moving out of the blood to help the animal swim — score 4
4. Carbon dioxide entering the blood from the air — score 5

Why: It took the question to ask who or what does it. It chose option 2 with score 7, against 5 for the next best. Its support: lesson 406, line 3: «Real rats are mammals and use lungs to take oxygen from air. Their blood carries that oxygen to body cells, just as the earlier lessons on lungs and circulatio…», reached through the same lesson line as the sentence the question matched. What matched: the same thing acted on «oxygen» (+4); it fills the role the question asks for (+2); the same doer «blood» (+1). The right option, 1, scored 4.

This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/biology/406-swimming-is-not-breathing-underwater/

📝 Swimming is not breathing underwater