---
title: Which of the following statements most accurately characterises the… — Fire: what it needs and how to put it… · tree and pragmatics
description: Which of the following statements most accurately characterises the requirements of combustion? Exam question 1 of lesson 12 «Fire: what it needs and how to put it out» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova'
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/chemistry/12-fire-what-it-needs/e1/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/) / [Fire: what it needs and how to put it…](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/12-fire-what-it-needs/) / e1

# Exam question 1 · Fire: what it needs and how to put it out

<!-- .ven lang=en -->
Which of the following statements most accurately characterises the requirements of combustion?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **What happens:** follow, characteris, require · **To what, where:** requirements, combustion

<!-- .vabout -->
This is exam question 1 of lesson 12 «Fire: what it needs and how to put it out» 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/12-fire-what-it-needs/#e1).

## The question {#question}

```conllu
# sent_id = question:chemistry:12-fire-what-it-needs:e1:1
# text = Which of the following statements most accurately characterises the requirements of combustion?
1	Which	which	PRON	WDT	PronType=Rel	8	nsubj	_	_
2	of	of	ADP	IN	_	5	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	following	follow	VERB	VBG	VerbForm=Ger	5	amod	_	_
5	statements	statement	NOUN	NNS	Number=Plur	8	obl	_	_
6	most	most	ADV	RBS	Degree=Sup	7	advmod	_	_
7	accurately	accurately	ADV	RB	_	8	advmod	_	_
8	characterises	characteris	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	requirements	requirement	NOUN	NNS	Number=Plur	8	obj	_	_
11	of	of	ADP	IN	_	12	case	_	_
12	combustion	combustion	NOUN	NN	Number=Sing	10	nmod	_	SpaceAfter=No
13	?	?	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **follow** | gerund |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **characteris** | present |  | the requirements of combustion |  |  |  | of the following statements; accurately *property* | tree rules |
| 3 | **require** |  |  | combustion |  |  |  |  | nom requirement «cognition 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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Fuel, heat and oxygen must be present simultaneously

```conllu
# sent_id = question:chemistry:12-fire-what-it-needs:e1:o1:1
# text = Fuel, heat and oxygen must be present simultaneously
1	Fuel	fuel	NOUN	NN	Number=Sing	8	nsubj	_	SpaceAfter=No
2	,	,	PUNCT	,	_	3	punct	_	_
3	heat	heat	NOUN	NN	Number=Sing	1	conj	_	_
4	and	and	CCONJ	CC	_	5	cc	_	_
5	oxygen	oxygen	NOUN	NN	Number=Sing	1	conj	_	_
6	must	must	AUX	MD	VerbForm=Fin	8	aux	_	_
7	be	be	AUX	VB	VerbForm=Inf	8	cop	_	_
8	present	present	ADJ	JJ	Degree=Pos	0	root	_	_
9	simultaneously	simultaneously	ADV	RB	_	8	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | must | Fuel and heat and oxygen |  |  |  |  | present, simultaneously *property* | tree rules |

### Option 2 {#o2}

<!-- .ven lang=en -->
Heat and water must be present together

```conllu
# sent_id = question:chemistry:12-fire-what-it-needs:e1:o2:1
# text = Heat and water must be present together
1	Heat	heat	NOUN	NN	Number=Sing	6	nsubj	_	_
2	and	and	CCONJ	CC	_	3	cc	_	_
3	water	water	NOUN	NN	Number=Sing	1	conj	_	_
4	must	must	AUX	MD	VerbForm=Fin	6	aux	_	_
5	be	be	AUX	VB	VerbForm=Inf	6	cop	_	_
6	present	present	ADJ	JJ	Degree=Pos	0	root	_	_
7	together	together	ADV	RB	_	6	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | must | Heat and water |  |  |  |  | present, together *property* | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
Fuel alone suffices in the absence of air, provided it be heated

```conllu
# sent_id = question:chemistry:12-fire-what-it-needs:e1:o3:1
# text = Fuel alone suffices in the absence of air, provided it be heated
1	Fuel	fuel	NOUN	NN	Number=Sing	3	nsubj	_	_
2	alone	alone	ADV	RB	_	3	advmod	_	_
3	suffices	suffice	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	absence	absence	NOUN	NN	Number=Sing	3	obl	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	air	air	NOUN	NN	Number=Sing	6	nmod	_	SpaceAfter=No
9	,	,	PUNCT	,	_	10	punct	_	_
10	provided	provide	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	conj	_	_
11	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	10	obj	_	_
12	be	be	AUX	VB	VerbForm=Inf	13	aux:pass	_	_
13	heated	heat	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	10	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **suffice** | present | Fuel |  |  | the absence of air |  | alone *property* | tree rules |
| 2 | **provide** | past | Fuel *not said here* | Fuel |  |  |  |  | tree rules |
| 3 | **heat** | infinitive · passive | Fuel *not said here* |  |  |  |  |  | vn cooking-45.3 «NP.patient V» |
| 4 | **absent** |  |  | air |  |  |  |  | nom absence «state transitive»: of=patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Oxygen alone suffices in the absence of fuel

```conllu
# sent_id = question:chemistry:12-fire-what-it-needs:e1:o4:1
# text = Oxygen alone suffices in the absence of fuel
1	Oxygen	oxygen	NOUN	NN	Number=Sing	3	nsubj	_	_
2	alone	alone	ADV	RB	_	1	advmod	_	_
3	suffices	suffice	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	absence	absence	NOUN	NN	Number=Sing	3	obl	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	fuel	fuel	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **suffice** | present | Oxygen |  |  | the absence of fuel |  |  | tree rules |
| 2 | **absent** |  |  | fuel |  |  |  |  | nom absence «state 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 -->

<!-- pn -->
- ← previous: [Fire: what it needs and how to put it…, test 10](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/12-fire-what-it-needs/t10/)
- next →: [Fire: what it needs and how to put it…, exam 2](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/12-fire-what-it-needs/e2/)
- ↑ back to [Fire: what it needs and how to put it out](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/12-fire-what-it-needs/)