---
title: Identify the principal reason for which the Earth does not descend i… — The Moon, the planets and the pull tha… · tree and pragmatics
description: Identify the principal reason for which the Earth does not descend into the Sun. Exam question 2 of lesson 2 «The Moon, the planets and the pull that holds them» 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 
---

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# Exam question 2 · The Moon, the planets and the pull that holds them

<!-- .ven lang=en -->
Identify the principal reason for which the Earth does not descend into the Sun.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, Earth · **What happens:** identify, not descend · **To what, where:** principal reason

<!-- .vabout -->
This is exam question 2 of lesson 2 «The Moon, the planets and the pull that holds them» 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/2-the-moon-the-planets-and-the-pull/#e2).

## The question {#question}

```conllu
# sent_id = question:physics:2-the-moon-the-planets-and-the-pull:e2:1
# text = Identify the principal reason for which the Earth does not descend into the Sun.
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	11	obl	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	Earth	Earth	PROPN	NNP	Number=Sing	11	nsubj	_	_
9	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	aux	_	_
10	not	not	PART	RB	Polarity=Neg	11	advmod	_	_
11	descend	descend	VERB	VB	VerbForm=Inf	4	acl:relcl	_	_
12	into	into	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	Sun.	Sunday	PROPN	NNP	Number=Sing	1	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal reason |  |  | sunday |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **not** **descend** | present · do-support | the Earth |  |  |  |  | for the principal reason | vn meander-47.7-1 «NP V»: agent=Theme |

<!-- .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 -->
The Sun exerts a repulsive force upon the Earth

```conllu
# sent_id = question:physics:2-the-moon-the-planets-and-the-pull:e2:o1:1
# text = The Sun exerts a repulsive force upon the Earth
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Sun	Sun	PROPN	NNP	Number=Sing	3	nsubj	_	_
3	exerts	exert	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	repulsive	repulsive	ADJ	JJ	Degree=Pos	6	amod	_	_
6	force	force	NOUN	NN	Number=Sing	3	obj	_	_
7	upon	upon	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	Earth	Earth	PROPN	NNP	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **exert** | present | the Sun | a repulsive force |  |  |  | upon the Earth | vn use-105.1 «NP V NP»: agent=Agent force=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The gravitation of the Sun does not extend so far

```conllu
# sent_id = question:physics:2-the-moon-the-planets-and-the-pull:e2:o2:1
# text = The gravitation of the Sun does not extend so far
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	gravitation	gravitation	NOUN	NN	Number=Sing	8	nsubj	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	Sun	Sun	PROPN	NNP	Number=Sing	2	nmod	_	_
6	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux	_	_
7	not	not	PART	RB	Polarity=Neg	8	advmod	_	_
8	extend	extend	VERB	VB	VerbForm=Inf	0	root	_	_
9	so	so	ADV	RB	_	10	advmod	_	_
10	far	far	ADV	RB	Degree=Pos	8	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **extend** | present · do-support | the gravitation of the Sun |  |  |  |  | far *property* | vn exist-47.1 «NP V»: agent=Theme |
| 2 | **gravitate** |  | the Sun |  |  |  |  |  | nom gravitation «phenomenon intransitive»: of=agent |

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

<!-- .ven lang=en -->
Its lateral velocity continually carries it past the Sun

```conllu
# sent_id = question:physics:2-the-moon-the-planets-and-the-pull:e2:o3:1
# text = Its lateral velocity continually carries it past the Sun
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	3	nmod:poss	_	_
2	lateral	lateral	ADJ	JJ	Degree=Pos	3	amod	_	_
3	velocity	velocity	NOUN	NN	Number=Sing	5	nsubj	_	_
4	continually	continually	ADV	RB	_	5	advmod	_	_
5	carries	carry	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
6	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	obj	_	_
7	past	past	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	Sun	Sun	PROPN	NNP	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **carry** | present | Its lateral velocity | it |  |  |  | past the Sun; continually *property* | vn carry-11.4 «NP V NP»: agent=Agent it=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
The intervening space impedes all motion

```conllu
# sent_id = question:physics:2-the-moon-the-planets-and-the-pull:e2:o4:1
# text = The intervening space impedes all motion
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	intervening	intervening	NOUN	NN	Number=Sing	3	compound	_	_
3	space	space	NOUN	NN	Number=Sing	4	nsubj	_	_
4	impedes	impede	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	all	all	DET	DT	PronType=Tot	6	det	_	_
6	motion	motion	NOUN	NN	Number=Sing	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **impede** | present | the intervening space | all motion |  |  |  |  | vn discourage-64.5-1 «NP V NP»: agent=Causer motion=Eventuality |

<!-- div src -->

**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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- ← previous: [The Moon, the planets and the pull tha…, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/physics/2-the-moon-the-planets-and-the-pull/e1/)
- next →: [The Moon, the planets and the pull tha…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/physics/2-the-moon-the-planets-and-the-pull/e3/)
- ↑ back to [The Moon, the planets and the pull that holds them](https://md.mova.elamur.ai/free/en/corpora/questions/physics/2-the-moon-the-planets-and-the-pull/)