---
title: Cooking is chemistry — how Mova does on the tests · Chemistry
description: Lesson 10 of the chemistry course of Mova's primary school: 6 of 10 tests right, exam 2 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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# Cooking is chemistry

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**Tests:** 6 of 10 right · **Exam:** 2 of 4 right · **Kind:** ★★ · **Understood:** 5 of 14 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 10 of the chemistry 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](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/10-cooking-is-chemistry/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/).

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### Test 1 · ★★ · wrong ✗ {#t1}

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Your cousin says fish soaked in lime juice is "cooked, same as frying". What is the truth?

- **1.** Lime juice freezes the fish — no support
- **2.** Nothing happens to the fish at all — no support
- **3.** It is fully cooked and boiling hot, just like fish from a frying pan — **← Mova's choice** · score 6
- **4.** It turns white as proteins unfold, but it has not been heated — **✓ the right answer** · score 4

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**Why:** It took the question to ask which statement is true. It chose option 3 with score 6, against 4 for the next best. Its support: lesson 10, line 15: «Acid such as lemon or lime juice unfolds proteins as heat does; fish soaked in lime juice turns white but has not been heated.», reached through the remembered sentence the question matched. What matched: the same thing acted on «fish» (+4); the same circumstance (+4). Against it: a different action (counts against) (-2). The right option, 4, scored 4. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t1/)

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### Test 2 · ★★ · right ✓ {#t2}

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"why's the jelly packet say no fresh pineapple, that's mad" Best answer?

- **1.** Pineapple is poisonous with sugar — no support
- **2.** Fresh pineapple has a substance that cuts up gelatine — **← Mova's choice** · **✓ the right answer** · score 3
- **3.** Pineapple turns jelly into juice gas — no support
- **4.** Pineapple makes the jelly far too sweet to eat — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 3, the only option with support. Its support: lesson 10, line 11: «Jelly sets because gelatine molecules form a loose net that traps water; fresh pineapple contains a substance that cuts gelatine and stops it setting.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «substance» (+2); the same doer «fresh pineapple» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t2/)

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### Test 3 · ★★ · wrong ✗ {#t3}

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What would happen if you used a handful of baking powder instead of a teaspoon?

- **1.** They would not rise at all — **← Mova's choice** · no support
- **2.** The pancakes would taste soapy and bitter — **✓ the right answer** · no support
- **3.** They would be perfect, only twice as tall and fluffy — no support
- **4.** They would turn bright blue — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t3/)

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### Test 4 · ★★ · right ✓ {#t4}

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In a cooking game, a kid stirs hot caramel with his finger to taste it. What's wrong?

- **1.** Nothing is wrong, because golden caramel is only ever just warm to touch — no support
- **2.** Hot caramel is much hotter than boiling water and sticks to skin — **← Mova's choice** · **✓ the right answer** · score 5
- **3.** Caramel is cold when it is golden — no support
- **4.** It is fine if you lick it fast — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 5, the only option with support. Its support: lesson 10, line 9: «Caramel is sugar broken down by strong heat into new substances; hot caramel is much hotter than boiling water and sticks to skin.», reached through the option's own match among the sentences about the question's things. What matched: the same circumstance (+2); the same doer «hot caramel» (+1); the same property (+1); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t4/)

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### Test 5 · ★★ · right ✓ {#t5}

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"why does cutting onions make me cry but the whole onion in the bag doesn't" Best answer?

- **1.** Whole onions are always kept frozen in the shop, so they cannot sting — no support
- **2.** The stinging chemicals are made only when the onion is cut — **← Mova's choice** · **✓ the right answer** · score 4
- **3.** Bags soak up all the smell — no support
- **4.** Your eyes only see cut onions — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 4, the only option with support. Its support: lesson 10, line 14: «The chemicals that make you cry are made only when an onion is cut.», reached through a sentence linked to the one the question matched. What matched: the same action «make» (+2); the same thing acted on «chemicals» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t5/)

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### Test 6 · ★★ · right ✓ {#t6}

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Why do microwave instructions say "stir halfway"?

- **1.** So the hot and cooler parts mix and heat evenly — **← Mova's choice** · **✓ the right answer** · no support
- **2.** So the microwave has a chance to cool down — no support
- **3.** So the bowl stays clean — no support
- **4.** So the soup does not go bad — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t6/)

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### Test 7 · ★★ · wrong ✗ {#t7}

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Your friend's popcorn is old and half the kernels won't pop. Why?

- **1.** They have too much water in them — **← Mova's choice** · no support
- **2.** Old kernels are made of stone — no support
- **3.** They have dried out and have too little water inside — **✓ the right answer** · no support
- **4.** They are too fresh and still soft — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t7/)

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### Test 8 · ★★ · right ✓ {#t8}

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Why does fried chicken taste different from boiled chicken?

- **1.** Frying is hot enough for browning reactions, boiling is not — **← Mova's choice** · **✓ the right answer** · no support
- **2.** Boiling adds salt to the chicken and frying never adds any at all — no support
- **3.** Fried chicken is a different animal — no support
- **4.** Boiled chicken has no protein — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t8/)

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### Test 9 · ★★ · right ✓ {#t9}

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"takeaway rice been on the side all night, just nuke it" What is the risk?

- **1.** Germs may have grown in it, which can upset your tummy — **← Mova's choice** · **✓ the right answer** · score 6
- **2.** It will turn back into hard rice — no support
- **3.** It will explode in the microwave — no support
- **4.** None, a microwave always kills every germ and every poison — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 6, the only option with support. Its support: lesson 10, line 17: «Rice softens and swells as it soaks up water into its starch; leftover rice should be cooled quickly and kept in the fridge, because some germs grow in it fast…», reached through a sentence linked to the one the question matched. What matched: the same action «grow» (+2); the same doer «germs» (+2); the same place «rice» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t9/)

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### Test 10 · ★★ · wrong ✗ {#t10}

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What would happen if you boiled an egg for 25 minutes?

- **1.** The yolk would melt and go runny again — **← Mova's choice** · no support
- **2.** The shell would turn into jelly — no support
- **3.** The yolk would be hard and dry, maybe with a green ring — **✓ the right answer** · no support
- **4.** The egg would turn into a chick — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/t10/)

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### Exam question 1 · formal language · right ✓ {#e1}

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Which of the following statements most accurately characterises the browning of meat in a hot pan?

- **1.** A reaction between sugars and proteins producing new flavour molecules — **← Mova's choice** · **✓ the right answer** · no support
- **2.** The deposition of pigment from the pan upon the surface of the meat — no support
- **3.** A purely physical change wholly reversible on cooling — no support
- **4.** The rusting of iron contained in the meat — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/e1/)

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### Exam question 2 · formal language · right ✓ {#e2}

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Identify the principal reason for which a popcorn kernel bursts upon heating.

- **1.** The water within is converted to steam, raising the pressure within the shell — **← Mova's choice** · **✓ the right answer** · no support
- **2.** The oil of the pan ignites within the kernel — no support
- **3.** The kernel contracts upon heating — no support
- **4.** Air from without is forced into the kernel by the heat of the pan until it ruptures — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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It is given that fresh pineapple has been added to a jelly mixture. Ascertain the probable consequence.

- **1.** The jelly turns to ice — **← Mova's choice** · no support
- **2.** The jelly acquires a sweeter flavour alone — no support
- **3.** The jelly fails to set, the gelatine being broken down — **✓ the right answer** · no support
- **4.** The jelly sets more firmly and more rapidly than usual — no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/e3/)

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### Exam question 4 · formal language · wrong ✗ {#e4}

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Select the response that is consistent with the established facts concerning the storage of cooked rice.

- **1.** It should be stored in a warm place to preserve its softness, refrigeration rendering it hard and unfit for consumption — **← Mova's choice** · no support
- **2.** It may be kept at room temperature indefinitely — no support
- **3.** It becomes poisonous upon refrigeration — no support
- **4.** It should be cooled promptly and refrigerated, certain germs multiplying rapidly at room temperature — **✓ the right answer** · no support

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**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](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/10-cooking-is-chemistry/e4/)

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- ← previous: [9. Changes you can undo and changes you can't](https://md.mova.elamur.ai/free/en/school-run/chemistry/9-changes-you-can-and-cannot-undo/)
- next →: [11. The candle and what burning is](https://md.mova.elamur.ai/free/en/school-run/chemistry/11-the-candle-and-burning/)
- ↑ back to [Chemistry](https://md.mova.elamur.ai/free/en/school-run/chemistry/)