---
title: Ascertain the reason for which a sealed fizzy drink exposed to great… — Fizzy drinks, Mentos and cola · tree and pragmatics
description: Ascertain the reason for which a sealed fizzy drink exposed to great heat may burst. Exam question 3 of lesson 19 «Fizzy drinks, Mentos and cola» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Exam question 3 · Fizzy drinks, Mentos and cola

<!-- .ven lang=en -->
Ascertain the reason for which a sealed fizzy drink exposed to great heat may burst.

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 3 · right ✓ · **Who acts:** you, sealed fizzy drink · **What happens:** ascertain, seal, expose, burst · **To what, where:** reason, sealed fizzy drink, great heat

<!-- .vabout -->
This is exam question 3 of lesson 19 «Fizzy drinks, Mentos and cola» of the chemistry course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/19-fizzy-drinks-mentos-and-cola/#e3).

## The question {#question}

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e3:1
# text = Ascertain the reason for which a sealed fizzy drink exposed to great heat may burst.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	15	obl	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
7	sealed	seal	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	9	amod	_	_
8	fizzy	fizzy	ADJ	JJ	Degree=Pos	9	amod	_	_
9	drink	drink	NOUN	NN	Number=Sing	15	nsubj	_	_
10	exposed	expose	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	9	acl	_	_
11	to	to	ADP	IN	_	13	case	_	_
12	great	great	ADJ	JJ	Degree=Pos	13	amod	_	_
13	heat	heat	NOUN	NN	Number=Sing	10	obl	_	_
14	may	may	AUX	MD	VerbForm=Fin	15	aux	_	_
15	burst	burst	VERB	VB	VerbForm=Inf	3	acl:relcl	_	SpaceAfter=No
16	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the reason |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent reason=Topic |
| 2 | **seal** | participle |  |  |  |  |  |  | vn tape-22.4 «NP V ADV-Middle»: agent=Patient |
| 3 | **expose** | participle |  | a sealed fizzy drink *not said here* | great heat |  |  |  | vn reflexive\_appearance-48.1.2 «NP V NP PP.recipient»: agent=Agent to heat=Recipient |
| 4 | **burst** | may | a sealed fizzy drink |  |  |  |  | for the reason | vn appear-48.1.1 «NP V»: agent=Theme |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Heat removes all the gas from the container instantly

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e3:o1:1
# text = Heat removes all the gas from the container instantly
1	Heat	heat	NOUN	NN	Number=Sing	2	nsubj	_	_
2	removes	remove	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	all	all	DET	PDT	PronType=Tot	5	det:predet	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	gas	gas	NOUN	NN	Number=Sing	2	obj	_	_
6	from	from	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	container	container	NOUN	NN	Number=Sing	2	obl	_	_
9	instantly	instantly	ADV	RB	_	2	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **remove** | present | Heat | all gas |  | the container |  | instantly *property* | vn fire-10.10 «NP V NP PP.source»: agent=Agent gas=Theme from container=Source |

### Option 2 {#o2}

<!-- .ven lang=en -->
Heat causes the metal to contract and crush the liquid

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e3:o2:1
# text = Heat causes the metal to contract and crush the liquid
1	Heat	heat	NOUN	NN	Number=Sing	2	nsubj	_	_
2	causes	cause	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	metal	metal	NOUN	NN	Number=Sing	2	obj	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	contract	contract	VERB	VB	VerbForm=Inf	2	xcomp	_	_
7	and	and	CCONJ	CC	_	8	cc	_	_
8	crush	crush	VERB	VB	Mood=Imp|VerbForm=Fin	6	conj	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	liquid	liquid	NOUN	NN	Number=Sing	8	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | Heat | the metal |  |  |  |  | tree rules |
| 2 | **contract** | to-infinitive | the metal *not said here* |  |  |  |  |  | vn bend-45.2 «NP.patient V»: agent=Patient |
| 3 | **crush** | infinitive | the metal *not said here* | the liquid |  |  |  |  | vn carve-21.2-1 «NP V NP»: agent=Agent liquid=Patient |

### Option 3 · ← Mova's choice · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Warm liquid holds less dissolved gas, and the internal pressure rises

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e3:o3:1
# text = Warm liquid holds less dissolved gas, and the internal pressure rises
1	Warm	warm	ADJ	JJ	Degree=Pos	2	amod	_	_
2	liquid	liquid	NOUN	NN	Number=Sing	3	nsubj	_	_
3	holds	hold	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	less	less	ADV	RBR	Degree=Cmp	5	advmod	_	_
5	dissolved	dissolve	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	6	amod	_	_
6	gas	gas	NOUN	NN	Number=Sing	3	obj	_	SpaceAfter=No
7	,	,	PUNCT	,	_	12	punct	_	_
8	and	and	CCONJ	CC	_	12	cc	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	internal	internal	ADJ	JJ	Degree=Pos	11	amod	_	_
11	pressure	pressure	NOUN	NN	Number=Sing	12	nsubj	_	_
12	rises	rise	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hold** | present | Warm liquid | dissolved gas |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent gas=Theme |
| 2 | **dissolve** | participle |  |  |  |  |  | less *property* | vn break-45.1 «NP.patient V»: agent=Patient |
| 3 | **rise** | present | the internal pressure |  |  |  |  |  | vn assuming\_position-50 «NP V»: agent=Agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
Heat converts the sugar of the drink into an explosive and highly unstable substance

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e3:o4:1
# text = Heat converts the sugar of the drink into an explosive and highly unstable substance
1	Heat	heat	NOUN	NN	Number=Sing	2	nsubj	_	_
2	converts	convert	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	sugar	sugar	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	drink	drink	NOUN	NN	Number=Sing	4	nmod	_	_
8	into	into	ADP	IN	_	14	case	_	_
9	an	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
10	explosive	explosive	ADJ	JJ	Degree=Pos	14	amod	_	_
11	and	and	CCONJ	CC	_	13	cc	_	_
12	highly	highly	ADV	RB	_	13	advmod	_	_
13	unstable	unstable	ADJ	JJ	Degree=Pos	10	conj	_	_
14	substance	substance	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **convert** | present | Heat | the sugar of the drink |  |  |  | into a explosive substance *result* | vn turn-26.6.1-1 «NP V NP.patient PP.result»: agent=Agent sugar=Patient into substance=Result |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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