---
title: Ascertain the reason for which two high tides occur at a given locat… — Seasons and tides · tree and pragmatics
description: Ascertain the reason for which two high tides occur at a given location within a single day. Exam question 2 of lesson 40 «Seasons and tides» 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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# Exam question 2 · Seasons and tides

<!-- .ven lang=en -->
Ascertain the reason for which two high tides occur at a given location within a single day.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, two high tides · **What happens:** ascertain, occur, give · **To what, where:** reason, given location

<!-- .vabout -->
This is exam question 2 of lesson 40 «Seasons and tides» of the physics 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/physics/40-seasons-and-tides/#e2).

## The question {#question}

```conllu
# sent_id = question:physics:40-seasons-and-tides:e2:1
# text = Ascertain the reason for which two high tides occur at a given location within a single day.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	9	obl	_	_
6	two	two	NUM	CD	NumForm=Word|NumType=Card	8	nummod	_	_
7	high	high	ADJ	JJ	Degree=Pos	8	amod	_	_
8	tides	tide	NOUN	NNS	Number=Plur	9	nsubj	_	_
9	occur	occur	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	acl:relcl	_	_
10	at	at	ADP	IN	_	13	case	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
12	given	give	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	13	amod	_	_
13	location	location	NOUN	NN	Number=Sing	9	obl	_	_
14	within	within	ADP	IN	_	17	case	_	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
16	single	single	ADJ	JJ	Degree=Pos	17	amod	_	_
17	day	day	NOUN	NN	Number=Sing	9	obl	_	SpaceAfter=No
18	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the reason |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent reason=Topic |
| 2 | **occur** | present | two high tides |  |  | a given location | day | for the reason | vn occur-48.3-1 «NP V PP»: agent=Theme at location=Location |
| 3 | **give** | participle |  |  |  |  |  |  | vn break\_down-45.8 «NP 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 -->
Rivers discharge into the sea on two occasions each day

```conllu
# sent_id = question:physics:40-seasons-and-tides:e2:o1:1
# text = Rivers discharge into the sea on two occasions each day
1	Rivers	river	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	discharge	discharge	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	into	into	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	sea	sea	NOUN	NN	Number=Sing	2	obl	_	_
6	on	on	ADP	IN	_	8	case	_	_
7	two	two	NUM	CD	NumForm=Word|NumType=Card	8	nummod	_	_
8	occasions	occasion	NOUN	NNS	Number=Plur	2	obl	_	_
9	each	each	DET	DT	PronType=Tot	10	det	_	_
10	day	day	NOUN	NN	Number=Sing	2	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **discharge** | present | Rivers |  |  | the sea | day | on two occasions | vn banish-10.2 «NP V NP»: agent=Agent |

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

<!-- .ven lang=en -->
The Moon raises bulges of water on both the near and the far side of the Earth

<!-- fold The tree, 17 words -->
```conllu
# sent_id = question:physics:40-seasons-and-tides:e2:o2:1
# text = The Moon raises bulges of water on both the near and the far side of the Earth
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	3	nsubj	_	_
3	raises	raise	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	bulges	bulge	NOUN	NNS	Number=Plur	3	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	water	water	NOUN	NN	Number=Sing	4	nmod	_	_
7	on	on	SCONJ	IN	_	10	mark	_	_
8	both	both	CCONJ	CC	_	10	cc:preconj	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	near	near	ADJ	JJ	Degree=Pos	3	advcl	_	_
11	and	and	CCONJ	CC	_	14	cc	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
13	far	far	ADJ	JJ	Degree=Pos	14	amod	_	_
14	side	side	NOUN	NN	Number=Sing	10	conj	_	_
15	of	of	ADP	IN	_	17	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	_	_
17	Earth	Earth	PROPN	NNP	Number=Sing	14	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **raise** | present | the Moon | bulges of water |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent bulge=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
The winds reverse their direction twice daily

```conllu
# sent_id = question:physics:40-seasons-and-tides:e2:o3:1
# text = The winds reverse their direction twice daily
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	winds	wind	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	reverse	reverse	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
5	direction	direction	NOUN	NN	Number=Sing	3	obj	_	_
6	twice	twice	ADV	RB	NumForm=Word|NumType=Mult	3	advmod	_	_
7	daily	daily	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **reverse** | present | the winds | winds's direction |  |  |  | daily, twice *property* | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent direction=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The Moon completes two revolutions about the Earth each day

```conllu
# sent_id = question:physics:40-seasons-and-tides:e2:o4:1
# text = The Moon completes two revolutions about the Earth each day
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	3	nsubj	_	_
3	completes	complete	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	two	two	NUM	CD	NumForm=Word|NumType=Card	5	nummod	_	_
5	revolutions	revolution	NOUN	NNS	Number=Plur	3	obj	_	_
6	about	about	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	Earth	Earth	PROPN	NNP	Number=Sing	5	nmod	_	_
9	each	each	DET	DT	PronType=Tot	10	det	_	_
10	day	day	NOUN	NN	Number=Sing	3	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **complete** | present | the Moon | two revolutions |  |  | day | about the Earth | vn complete-55.2 «NP V NP»: agent=Agent revolution=Eventuality |

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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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- ← previous: [Seasons and tides, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/physics/40-seasons-and-tides/e1/)
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