---
title: Identify the principal reason for which the stars appear to move acr… — Stars, planets and constellations in t… · tree and pragmatics
description: Identify the principal reason for which the stars appear to move across the sky at night. Exam question 1 of lesson 70 «Stars, planets and constellations in the night sky» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's
---

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# Exam question 1 · Stars, planets and constellations in the night sky

<!-- .ven lang=en -->
Identify the principal reason for which the stars appear to move across the sky at night.

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, stars · **What happens:** identify, appear, move · **To what, where:** principal reason, sky

<!-- .vabout -->
This is exam question 1 of lesson 70 «Stars, planets and constellations in the night sky» of the world 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/world/70-the-night-sky/#e1).

## The question {#question}

```conllu
# sent_id = question:world:70-the-night-sky:e1:1
# text = Identify the principal reason for which the stars appear to move across the sky at night.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	9	obl	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	stars	star	NOUN	NNS	Number=Plur	9	nsubj	_	_
9	appear	appear	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	acl:relcl	_	_
10	to	to	PART	TO	_	11	mark	_	_
11	move	move	VERB	VB	VerbForm=Inf	9	xcomp	_	_
12	across	across	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	sky	sky	NOUN	NN	Number=Sing	11	obl	_	_
15	at	at	ADP	IN	_	16	case	_	_
16	night	night	NOUN	NN	Number=Sing	11	obl	_	SpaceAfter=No
17	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **appear** | present | the stars |  |  |  |  | for the principal reason | vn seem-109-1-1-1 «NP V S\_INF»: agent=Theme clause=Attribute |
| 3 | **move** | to-infinitive | the stars *not said here* |  |  | the sky | night |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme across sky=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 wind in the upper atmosphere

```conllu
# sent_id = question:world:70-the-night-sky:e1:o1:1
# text = The wind in the upper atmosphere
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	wind	wind	NOUN	NN	Number=Sing	0	root	_	_
3	in	in	ADP	IN	_	6	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
5	upper	upper	ADJ	JJ	Degree=Pos	6	amod	_	_
6	atmosphere	atmosphere	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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

<!-- .ven lang=en -->
The rotation of the Earth

```conllu
# sent_id = question:world:70-the-night-sky:e1:o2:1
# text = The rotation of the Earth
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	rotation	rotation	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	Earth	Earth	PROPN	NNP	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rotate** |  | the Earth |  |  |  |  |  | nom rotation «act intransitive»: of=agent |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
The motion of the Moon across the sky

```conllu
# sent_id = question:world:70-the-night-sky:e1:o3:1
# text = The motion of the Moon across the sky
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	motion	motion	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	Moon	Moon	PROPN	NNP	Number=Sing	2	nmod	_	_
6	across	across	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	sky	sky	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **motion** |  | the Moon |  |  | the sky |  |  | nom motion «communication intransitive»: of=agent across=place |

### Option 4 {#o4}

<!-- .ven lang=en -->
The motion of the stars around the Sun

```conllu
# sent_id = question:world:70-the-night-sky:e1:o4:1
# text = The motion of the stars around the Sun
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	motion	motion	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	stars	star	NOUN	NNS	Number=Plur	2	nmod	_	_
6	around	around	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	Sun	Sun	PROPN	NNP	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **motion** |  | the stars around the Sun |  |  |  |  |  | nom motion «communication intransitive»: of=agent |

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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: [Stars, planets and constellations in t…, test 13](https://md.mova.elamur.ai/free/en/corpora/questions/world/70-the-night-sky/t13/)
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