---
title: What would happen if a huge eruption emptied a volcano's magma chamb… — Volcanoes: how and where · tree and pragmatics
description: What would happen if a huge eruption emptied a volcano's magma chamber? Test 6 of lesson 46 «Volcanoes: how and where» of the geography 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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# Test 6 · Volcanoes: how and where

<!-- .ven lang=en -->
What would happen if a huge eruption emptied a volcano's magma chamber?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** huge eruption · **What happens:** happen, empty · **To what, where:** magma chamber

<!-- .vabout -->
This is test 6 of lesson 46 «Volcanoes: how and where» of the geography course of Mova's primary school. 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/geography/46-volcanoes-how-and-where/#t6).

## The question {#question}

```conllu
# sent_id = question:geography:46-volcanoes-how-and-where:t6:1
# text = What would happen if a huge eruption emptied a volcano's magma chamber?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	if	if	SCONJ	IN	_	8	mark	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	huge	huge	ADJ	JJ	Degree=Pos	7	amod	_	_
7	eruption	eruption	NOUN	NN	Number=Sing	8	nsubj	_	_
8	emptied	empty	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	advcl	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	volcano	volcano	NOUN	NN	Number=Sing	13	nmod:poss	_	SpaceAfter=No
11	's	's	PART	POS	_	10	case	_	_
12	magma	magma	NOUN	NN	Number=Sing	13	compound	_	_
13	chamber	chamber	NOUN	NN	Number=Sing	8	obj	_	SpaceAfter=No
14	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **empty** *a condition, not said to happen* | past | a huge eruption | a volcano's magma chamber |  |  |  |  | vn clear-10.3-1 «NP V NP.source»: agent=Agent chamber=Source |

<!-- .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 -->
Nothing, the chamber stays empty and holds up

```conllu
# sent_id = question:geography:46-volcanoes-how-and-where:t6:o1:1
# text = Nothing, the chamber stays empty and holds up
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	5	nsubj	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	chamber	chamber	NOUN	NN	Number=Sing	5	nsubj	_	_
5	stays	stay	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	empty	empty	ADJ	JJ	Degree=Pos	5	xcomp	_	_
7	and	and	CCONJ	CC	_	8	cc	_	_
8	holds	hold	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	conj	_	_
9	up	up	ADP	RP	_	8	compound:prt	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stay** | present | Nothing |  |  |  |  | empty *property* | vn exist-47.1 «NP V»: agent=Theme |
| 2 | **hold up** | present | Nothing *not said here* |  |  |  |  |  | vn support-15.3-1 «NP V NP»: agent=Pivot |

### Option 2 {#o2}

<!-- .ven lang=en -->
The volcano would turn into a lake of lava for ever

```conllu
# sent_id = question:geography:46-volcanoes-how-and-where:t6:o2:1
# text = The volcano would turn into a lake of lava for ever
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	volcano	volcano	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	turn	turn	VERB	VB	VerbForm=Inf	0	root	_	_
5	into	into	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	lake	lake	NOUN	NN	Number=Sing	4	obl	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	lava	lava	NOUN	NN	Number=Sing	7	nmod	_	_
10	for	for	ADP	IN	_	11	case	_	_
11	ever	ever	ADV	RB	PronType=Ind	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | would | the volcano |  |  | a lake of lava |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme into lake=Trajectory |

### Option 3 {#o3}

<!-- .ven lang=en -->
The volcano would grow twice as tall

```conllu
# sent_id = question:geography:46-volcanoes-how-and-where:t6:o3:1
# text = The volcano would grow twice as tall
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	volcano	volcano	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	grow	grow	VERB	VB	VerbForm=Inf	0	root	_	_
5	twice	twice	ADV	RB	NumForm=Word|NumType=Mult	7	advmod	_	_
6	as	as	ADV	RB	_	7	advmod	_	_
7	tall	tall	ADJ	JJ	Degree=Pos	4	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | would | the volcano |  |  |  |  | tall *property* | vn appear-48.1.1 «NP V»: agent=Theme |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The ground above could collapse into a caldera

```conllu
# sent_id = question:geography:46-volcanoes-how-and-where:t6:o4:1
# text = The ground above could collapse into a caldera
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	ground	ground	NOUN	NN	Number=Sing	5	nsubj	_	_
3	above	above	ADV	RB	_	2	advmod	_	_
4	could	could	AUX	MD	VerbForm=Fin	5	aux	_	_
5	collapse	collapse	VERB	VB	VerbForm=Inf	0	root	_	_
6	into	into	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	caldera	caldera	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **collapse** | could | the ground |  |  | a caldera |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

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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.

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