---
title: Identify the principal reason for which a rocket carries its own oxy… — Rockets, satellites and astronauts · tree and pragmatics
description: Identify the principal reason for which a rocket carries its own oxygen. Exam question 2 of lesson 71 «Rockets, satellites and astronauts» of the world 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 · Rockets, satellites and astronauts

<!-- .ven lang=en -->
Identify the principal reason for which a rocket carries its own oxygen.

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**Mova's choice:** option 2 · **The right answer:** option 1 · wrong ✗ · **Who acts:** you, rocket · **What happens:** identify, carry · **To what, where:** principal reason, own oxygen

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This is exam question 2 of lesson 71 «Rockets, satellites and astronauts» 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/71-rockets-satellites-astronauts/#e2).

## The question {#question}

```conllu
# sent_id = question:world:71-rockets-satellites-astronauts:e2:1
# text = Identify the principal reason for which a rocket carries its own oxygen.
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	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	rocket	rocket	NOUN	NN	Number=Sing	9	nsubj	_	_
9	carries	carry	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	acl	_	_
10	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	12	nmod:poss	_	_
11	own	own	ADJ	JJ	Degree=Pos	12	amod	_	_
12	oxygen	oxygen	NOUN	NN	Number=Sing	9	obj	_	SpaceAfter=No
13	.	.	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 | **carry** | present | a rocket | rocket's own oxygen |  |  |  | for the principal reason | vn carry-11.4 «NP V NP»: agent=Agent oxygen=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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
There is no air in space

```conllu
# sent_id = question:world:71-rockets-satellites-astronauts:e2:o1:1
# text = There is no air in space
1	There	there	PRON	EX	PronType=Dem	2	expl	_	_
2	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	4	det	_	_
4	air	air	NOUN	NN	Number=Sing	2	nsubj	_	_
5	in	in	ADP	IN	_	6	case	_	_
6	space	space	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **be** | present | no air |  |  | space; there |  |  | vn exist-47.1 «NP V PP.location»: agent=Theme in space=Location |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
Oxygen is required for the astronauts' food alone

```conllu
# sent_id = question:world:71-rockets-satellites-astronauts:e2:o2:1
# text = Oxygen is required for the astronauts' food alone
1	Oxygen	oxygen	NOUN	NN	Number=Sing	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	required	require	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	for	for	ADP	IN	_	8	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	astronauts	astronaut	NOUN	NNS	Number=Plur	8	nmod:poss	_	SpaceAfter=No
7	'	's	PART	POS	_	6	case	_	_
8	food	food	NOUN	NN	Number=Sing	3	obl	_	_
9	alone	alone	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **require** | present · passive |  | Oxygen |  |  |  | for the astronauts's food; alone *property* | vn require-103-1 «NP V NP»: subject=Precondition |

### Option 3 {#o3}

<!-- .ven lang=en -->
Oxygen protects the rocket from heat

```conllu
# sent_id = question:world:71-rockets-satellites-astronauts:e2:o3:1
# text = Oxygen protects the rocket from heat
1	Oxygen	oxygen	NOUN	NN	Number=Sing	2	nsubj	_	_
2	protects	protect	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	rocket	rocket	NOUN	NN	Number=Sing	2	obj	_	_
5	from	from	ADP	IN	_	6	case	_	_
6	heat	heat	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **protect** | present | Oxygen | the rocket |  |  |  | from heat | vn defend-72.3 «NP V NP PP.theme»: agent=Agent rocket=Beneficiary from heat=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
Oxygen renders the rocket lighter

```conllu
# sent_id = question:world:71-rockets-satellites-astronauts:e2:o4:1
# text = Oxygen renders the rocket lighter
1	Oxygen	oxygen	NOUN	NN	Number=Sing	2	nsubj	_	_
2	renders	render	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	rocket	rocket	NOUN	NN	Number=Sing	2	obj	_	_
5	lighter	light	ADJ	JJR	Degree=Cmp	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **render** | present | Oxygen | the rocket |  |  |  | light *property* | vn give-13.1 «NP V NP»: agent=Agent rocket=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.

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