---
title: Identify the principal cause of the audible hiss upon the opening of… — Fizzy drinks, Mentos and cola · tree and pragmatics
description: Identify the principal cause of the audible hiss upon the opening of a sealed fizzy drink. Exam question 1 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 wron
---

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# Exam question 1 · Fizzy drinks, Mentos and cola

<!-- .ven lang=en -->
Identify the principal cause of the audible hiss upon the opening of a sealed fizzy drink.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you · **What happens:** identify, seal, cause · **To what, where:** principal cause, audible hiss

<!-- .vabout -->
This is exam question 1 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/#e1).

## The question {#question}

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e1:1
# text = Identify the principal cause of the audible hiss upon the opening of a sealed fizzy drink.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	cause	cause	NOUN	NN	Number=Sing	1	obj	_	_
5	of	of	ADP	IN	_	8	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	audible	audible	ADJ	JJ	Degree=Pos	8	amod	_	_
8	hiss	hiss	NOUN	NN	Number=Sing	4	nmod	_	_
9	upon	upon	ADP	IN	_	11	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	opening	opening	NOUN	NN	Number=Sing	8	nmod	_	_
12	of	of	ADP	IN	_	16	case	_	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
14	sealed	seal	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	16	amod	_	_
15	fizzy	fizzy	ADJ	JJ	Degree=Pos	16	amod	_	_
16	drink	drink	NOUN	NN	Number=Sing	11	nmod	_	SpaceAfter=No
17	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal cause of the audible hiss upon the opening of a sealed fizzy drink |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent cause=Theme |
| 2 | **seal** | participle |  |  |  |  |  |  | vn tape-22.4 «NP V ADV-Middle»: agent=Patient |
| 3 | **cause** |  |  | the audible hiss upon the opening of a sealed fizzy drink |  |  |  |  | nom cause «event transitive»: of=patient |

<!-- .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 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The container contracts as it is opened

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e1:o1:1
# text = The container contracts as it is opened
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	container	container	NOUN	NN	Number=Sing	3	nsubj	_	_
3	contracts	contract	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	as	as	SCONJ	IN	_	7	mark	_	_
5	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	7	nsubj:pass	_	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux:pass	_	_
7	opened	open	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	ccomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **contract** | present | the container |  |  |  |  |  | vn hire-13.5.3 «NP V NP to be NP»: agent=Agent clause=Attribute |
| 2 | **open** | present · passive |  | container |  |  |  |  | vn spatial\_configuration-47.6-1 «PP.location V NP»: subject=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The sugar reacts chemically with the atmosphere

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e1:o2:1
# text = The sugar reacts chemically with the atmosphere
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	sugar	sugar	NOUN	NN	Number=Sing	3	nsubj	_	_
3	reacts	react	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	chemically	chemically	ADV	RB	_	3	advmod	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	atmosphere	atmosphere	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **react** | present | the sugar |  |  |  |  | with the atmosphere; chemically *property* | vn respond-113 «NP V PP.predicate»: agent=Agent with atmosphere=Eventuality |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
The release of pressure permits dissolved gas to escape

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e1:o3:1
# text = The release of pressure permits dissolved gas to escape
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	release	release	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	pressure	pressure	NOUN	NN	Number=Sing	5	compound	_	_
5	permits	permit	NOUN	NNS	Number=Plur	2	nmod	_	_
6	dissolved	dissolve	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	amod	_	_
7	gas	gas	NOUN	NN	Number=Sing	5	conj	_	_
8	to	to	PART	TO	_	9	mark	_	_
9	escape	escape	VERB	VB	VerbForm=Inf	7	acl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** | participle |  |  |  |  |  |  | vn break-45.1 «NP.patient V»: agent=Patient |
| 2 | **escape** | to-infinitive |  |  |  |  |  |  | vn escape-51.1-1-1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
The admission of air causes the liquid to boil

```conllu
# sent_id = question:chemistry:19-fizzy-drinks-mentos-and-cola:e1:o4:1
# text = The admission of air causes the liquid to boil
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	admission	admission	NOUN	NN	Number=Sing	5	nsubj	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	air	air	NOUN	NN	Number=Sing	2	nmod	_	_
5	causes	cause	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	liquid	liquid	NOUN	NN	Number=Sing	5	obj	_	_
8	to	to	PART	TO	_	9	mark	_	_
9	boil	boil	VERB	VB	VerbForm=Inf	7	acl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | the admission of air | the liquid |  |  |  |  | vn engender-27.1-1 «NP V NP»: agent=Precondition liquid=Patient |
| 2 | **boil** | to-infinitive | the admission of air *not said here* | the liquid *not said here* |  |  |  |  | vn cooking-45.3 «NP.patient V»: agent=Patient |
| 3 | **admit** |  |  | air |  |  |  |  | nom admission «act transitive»: of=patient |

<!-- div src -->

**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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- ← previous: [Fizzy drinks, Mentos and cola, test 11](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/19-fizzy-drinks-mentos-and-cola/t11/)
- next →: [Fizzy drinks, Mentos and cola, exam 2](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/19-fizzy-drinks-mentos-and-cola/e2/)
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