---
title: Which is true about how sound weakens? — Bangs and loud sounds: firecrackers an… · tree and pragmatics
description: Which is true about how sound weakens? Test 8 · ★ of lesson 19 «Bangs and loud sounds: firecrackers and ears» of the physics 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 8 · ★ · Bangs and loud sounds: firecrackers and ears

<!-- .ven lang=en -->
Which is true about how sound weakens?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** sound · **What happens:** be, weaken

<!-- .vabout -->
This is test 8 · ★ of lesson 19 «Bangs and loud sounds: firecrackers and ears» of the physics 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/physics/19-bangs-and-loud-sounds-firecrackers-and-ears/#t8).

## The question {#question}

```conllu
# sent_id = question:physics:19-bangs-and-loud-sounds-firecrackers-and-ears:t8:1
# text = Which is true about how sound weakens?
1	Which	which	PRON	WDT	PronType=Rel	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	true	true	ADJ	JJ	Degree=Pos	0	root	_	_
4	about	about	SCONJ	IN	_	7	mark	_	_
5	how	how	ADV	WRB	PronType=Int	7	advmod	_	_
6	sound	sound	NOUN	NN	Number=Sing	7	nsubj	_	_
7	weakens	weaken	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	_	SpaceAfter=No
8	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present |  |  |  |  |  | true *property* | tree rules |
| 2 | **weaken** | present | sound |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=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 -->
It gets louder and louder the further it travels from the bang

```conllu
# sent_id = question:physics:19-bangs-and-loud-sounds-firecrackers-and-ears:t8:o1:1
# text = It gets louder and louder the further it travels from the bang
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	gets	get	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	louder	loud	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
4	and	and	CCONJ	CC	_	5	cc	_	_
5	louder	loud	ADJ	JJR	Degree=Cmp	3	conj	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	further	far	ADV	RBR	Degree=Cmp	9	advmod	_	_
8	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nsubj	_	_
9	travels	travel	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
10	from	from	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	bang	bang	NOUN	NN	Number=Sing	9	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **get** | present | It |  |  |  |  | loud *property* | vn comprehend-87.2-1 «NP V S\_ING»: agent=Experiencer |
| 2 | **travel** | present | it |  |  | the bang |  | far *property* | vn run-51.3.2-1 «NP V PP.location»: agent=Theme from bang=Trajectory |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
It spreads out over a bigger area the further it goes

```conllu
# sent_id = question:physics:19-bangs-and-loud-sounds-firecrackers-and-ears:t8:o2:1
# text = It spreads out over a bigger area the further it goes
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	spreads	spread	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	out	out	ADP	RP	_	2	compound:prt	_	_
4	over	over	ADP	IN	_	7	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	bigger	big	ADJ	JJR	Degree=Cmp	7	amod	_	_
7	area	area	NOUN	NN	Number=Sing	2	obl	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	further	far	ADV	RBR	Degree=Cmp	11	advmod	_	_
10	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	nsubj	_	_
11	goes	go	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **spread out** | present | It |  |  | a bigger area |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme over area=Location |
| 2 | **go** | present | area |  |  |  |  | far *property* | vn disappearance-48.2-1 «NP V»: agent=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
It stops completely after it has travelled one kilometre or so

```conllu
# sent_id = question:physics:19-bangs-and-loud-sounds-firecrackers-and-ears:t8:o3:1
# text = It stops completely after it has travelled one kilometre or so
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	stops	stop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	completely	completely	ADV	RB	_	2	advmod	_	_
4	after	after	SCONJ	IN	_	7	mark	_	_
5	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	7	nsubj:pass	_	_
6	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux	_	_
7	travelled	travell	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	advcl	_	_
8	one	one	NUM	CD	NumForm=Word|NumType=Card	9	nummod	_	_
9	kilometre	kilometre	NOUN	NN	Number=Sing	7	obj	_	_
10	or	or	CCONJ	CC	_	11	cc	_	_
11	so	so	ADV	RB	_	7	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stop** | present | It |  |  |  |  | completely *property* | vn stop-55.4-1-1 «NP.eventuality V»: agent=Eventuality |
| 2 | **travell** | present · perfect · passive |  | it |  |  |  |  | tree rules |

### Option 4 {#o4}

<!-- .ven lang=en -->
It weakens only at night, when the air is cold and heavy

```conllu
# sent_id = question:physics:19-bangs-and-loud-sounds-firecrackers-and-ears:t8:o4:1
# text = It weakens only at night, when the air is cold and heavy
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	weakens	weaken	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	only	only	ADV	RB	_	5	advmod	_	_
4	at	at	ADP	IN	_	5	case	_	_
5	night	night	NOUN	NN	Number=Sing	2	obl	_	SpaceAfter=No
6	,	,	PUNCT	,	_	11	punct	_	_
7	when	when	SCONJ	WRB	_	11	mark	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	air	air	NOUN	NN	Number=Sing	11	nsubj	_	_
10	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
11	cold	cold	ADJ	JJ	Degree=Pos	2	parataxis	_	_
12	and	and	CCONJ	CC	_	13	cc	_	_
13	heavy	heavy	ADJ	JJ	Degree=Pos	11	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **weaken** | present | It |  |  |  | night |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 2 | **is** | present | the air |  |  |  |  | cold *property* | tree rules |
| 3 | **be** |  | the air *not said here* |  |  |  |  |  | tree rules |

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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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