---
title: Why is a pressure gauge on the sea floor useful? — Tsunamis · tree and pragmatics
description: Why is a pressure gauge on the sea floor useful? Test 7 · ★ of lesson 45 «Tsunamis» 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 7 · ★ · Tsunamis

<!-- .ven lang=en -->
Why is a pressure gauge on the sea floor useful?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **What happens:** be · **To what, where:** pressure gauge, sea floor

<!-- .vabout -->
This is test 7 · ★ of lesson 45 «Tsunamis» 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/45-tsunamis/#t7).

## The question {#question}

```conllu
# sent_id = question:geography:45-tsunamis:t7:1
# text = Why is a pressure gauge on the sea floor useful?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	pressure	pressure	NOUN	NN	Number=Sing	5	compound	_	_
5	gauge	gauge	NOUN	NN	Number=Sing	0	root	_	_
6	on	on	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	sea	sea	NOUN	NN	Number=Sing	9	compound	_	_
9	floor	floor	NOUN	NN	Number=Sing	5	nmod	_	_
10	useful	useful	ADJ	JJ	Degree=Pos	9	amod	_	SpaceAfter=No
11	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present |  | a pressure gauge |  | the sea floor |  |  | tree rules |

<!-- .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 -->
It notices the extra water of a passing tsunami and sends a warning

```conllu
# sent_id = question:geography:45-tsunamis:t7:o1:1
# text = It notices the extra water of a passing tsunami and sends a warning
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	notices	notice	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	extra	extra	ADJ	JJ	Degree=Pos	5	amod	_	_
5	water	water	NOUN	NN	Number=Sing	2	obj	_	_
6	of	of	ADP	IN	_	9	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	passing	pass	VERB	VBG	VerbForm=Ger	9	amod	_	_
9	tsunami	tsunami	NOUN	NN	Number=Sing	5	nmod	_	_
10	and	and	CCONJ	CC	_	11	cc	_	_
11	sends	send	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	warning	warning	NOUN	NN	Number=Sing	11	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **notice** | present | It | the extra water of a passing tsunami |  |  |  |  | vn see-30.1-1 «NP V S»: agent=Experiencer water=Stimulus |
| 2 | **pass** | gerund |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 3 | **send** | present |  | a warning |  |  |  |  | vn confine-92-1 «NP V NP»: agent=Agent warning=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
It measures how salty the sea is

```conllu
# sent_id = question:geography:45-tsunamis:t7:o2:1
# text = It measures how salty the sea is
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	measures	measure	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	how	how	ADV	WRB	PronType=Int	4	advmod	_	_
4	salty	salty	ADJ	JJ	Degree=Pos	2	ccomp	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	sea	sea	NOUN	NN	Number=Sing	4	nsubj	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **measure** | present | It |  |  |  |  |  | vn register-54.1-2-1 «NP V NP.value»: agent=Theme |
| 2 | **is** | present | the sea |  |  |  |  | salty *property* | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
It tells sailors when it is high tide so they can get into harbour safely

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:geography:45-tsunamis:t7:o3:1
# text = It tells sailors when it is high tide so they can get into harbour safely
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	tells	tell	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	sailors	sailor	NOUN	NNS	Number=Plur	2	obj	_	_
4	when	when	ADV	WRB	PronType=Int	8	advmod	_	_
5	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	8	nsubj	_	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	cop	_	_
7	high	high	ADJ	JJ	Degree=Pos	8	amod	_	_
8	tide	tide	NOUN	NN	Number=Sing	2	obl	_	_
9	so	so	SCONJ	IN	_	12	mark	_	_
10	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	12	nsubj	_	_
11	can	can	AUX	MD	VerbForm=Fin	12	aux	_	_
12	get	get	VERB	VB	VerbForm=Inf	2	advcl	_	_
13	into	into	ADP	IN	_	14	case	_	_
14	harbour	harbour	NOUN	NN	Number=Sing	12	obl	_	_
15	safely	safely	ADV	RB	_	12	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **tell** *speech: assert* | present | It | sailors |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V NP.recipient»: agent=Agent sailor=Recipient |
| 2 | **is a** | present | it | high tide |  |  |  |  | tree rules |
| 3 | **get** | can | sailors *= sailor* |  |  | harbour |  | safely *property* | vn escape-51.1 «NP V PP.destination»: agent=Theme into harbour=Destination |

### Option 4 {#o4}

<!-- .ven lang=en -->
It stops the tsunami from moving any further

```conllu
# sent_id = question:geography:45-tsunamis:t7:o4:1
# text = It stops the tsunami from moving any further
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	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	tsunami	tsunami	NOUN	NN	Number=Sing	2	obj	_	_
5	from	from	SCONJ	IN	_	6	mark	_	_
6	moving	move	VERB	VBG	Tense=Pres|VerbForm=Part	2	advcl	_	_
7	any	any	ADV	RB	_	6	advmod	_	_
8	further	further	ADV	RB	_	6	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stop** | present | It | the tsunami |  |  |  |  | vn stop-55.4-1-1 «NP V NP.eventuality»: agent=Subeventuality tsunami=Eventuality |
| 2 | **move** | gerund |  |  |  |  |  | any, further *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

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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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