---
title: Why does air rush out of an untied balloon? — Weather: pressure, wind, clouds and st… · tree and pragmatics
description: Why does air rush out of an untied balloon? Test 3 of lesson 15 «Weather: pressure, wind, clouds and storms» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 3 · Weather: pressure, wind, clouds and storms

<!-- .ven lang=en -->
Why does air rush out of an untied balloon?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 3 · wrong ✗ · **Who acts:** air · **What happens:** rush out · **To what, where:** untied balloon

<!-- .vabout -->
This is test 3 of lesson 15 «Weather: pressure, wind, clouds and storms» of the world 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/world/15-weather/#t3).

## The question {#question}

```conllu
# sent_id = question:world:15-weather:t3:1
# text = Why does air rush out of an untied balloon?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	air	air	NOUN	NN	Number=Sing	4	nsubj	_	_
4	rush	rush	VERB	VB	VerbForm=Inf	0	root	_	_
5	out	out	ADP	IN	_	9	case	_	_
6	of	of	ADP	IN	_	9	case	_	_
7	an	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	untied	untied	ADJ	JJ	Degree=Pos	9	amod	_	_
9	balloon	balloon	NOUN	NN	Number=Sing	4	obl	_	SpaceAfter=No
10	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rush out** | present · do-support | air | a untied balloon |  |  |  |  | vn run-51.3.2-2-1 «NP V NP»: agent=Theme balloon=Trajectory |

<!-- .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 -->
The air inside is cooler than the air outside, so it escapes

```conllu
# sent_id = question:world:15-weather:t3:o1:1
# text = The air inside is cooler than the air outside, so it escapes
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	air	air	NOUN	NN	Number=Sing	5	nsubj	_	_
3	inside	inside	ADV	RB	_	2	advmod	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
5	cooler	cool	ADJ	JJR	Degree=Cmp	0	root	_	_
6	than	than	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	air	air	NOUN	NN	Number=Sing	5	obl	_	_
9	outside	outside	ADV	RB	_	8	advmod	_	SpaceAfter=No
10	,	,	PUNCT	,	_	13	punct	_	_
11	so	so	ADV	RB	_	13	advmod	_	_
12	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	13	nsubj	_	_
13	escapes	escape	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | the air |  |  |  |  | than the air; cool *property* | tree rules |
| 2 | **escape** | present | air |  |  |  |  |  | vn escape-51.1-1-1 «NP V»: agent=Theme |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
Air always moves upwards

```conllu
# sent_id = question:world:15-weather:t3:o2:1
# text = Air always moves upwards
1	Air	air	NOUN	NN	Number=Sing	3	nsubj	_	_
2	always	always	ADV	RB	PronType=Tot	3	advmod	_	_
3	moves	move	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	upwards	upwards	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | present | Air |  |  |  |  | always, upwards *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

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

<!-- .ven lang=en -->
It moves from high pressure inside to lower pressure outside

```conllu
# sent_id = question:world:15-weather:t3:o3:1
# text = It moves from high pressure inside to lower pressure outside
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	moves	move	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	from	from	ADP	IN	_	5	case	_	_
4	high	high	ADJ	JJ	Degree=Pos	5	amod	_	_
5	pressure	pressure	NOUN	NN	Number=Sing	2	obl	_	_
6	inside	inside	ADV	RB	_	2	advmod	_	_
7	to	to	PART	TO	_	9	mark	_	_
8	lower	low	ADJ	JJR	Degree=Cmp	9	amod	_	_
9	pressure	pressure	NOUN	NN	Number=Sing	2	advcl	_	_
10	outside	outside	ADV	RB	_	2	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | present | It |  |  | high pressure |  | inside, outside *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme from pressure=Trajectory |

### Option 4 {#o4}

<!-- .ven lang=en -->
The rubber pulls air in from outside

```conllu
# sent_id = question:world:15-weather:t3:o4:1
# text = The rubber pulls air in from outside
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	rubber	rubber	NOUN	NN	Number=Sing	3	nsubj	_	_
3	pulls	pull	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	air	air	NOUN	NN	Number=Sing	3	obj	_	_
5	in	in	ADV	RB	_	3	advmod	_	_
6	from	from	ADP	IN	_	7	case	_	_
7	outside	outside	ADV	RB	_	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **pull** | present | the rubber | air |  |  |  |  | vn carry-11.4 «NP V NP PP.initial\_location»: agent=Agent air=Theme from outside=Initial\_Location |

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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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