---
title: Identify the gas which constitutes the greater part of the atmosphere. — The air we breathe · tree and pragmatics
description: Identify the gas which constitutes the greater part of the atmosphere. Exam question 1 of lesson 33 «The air we breathe» of the chemistry 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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# Exam question 1 · The air we breathe

<!-- .ven lang=en -->
Identify the gas which constitutes the greater part of the atmosphere.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, gas · **What happens:** identify, constitute · **To what, where:** gas, greater part

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This is exam question 1 of lesson 33 «The air we breathe» of the chemistry 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/chemistry/33-the-air-we-breathe/#e1).

## The question {#question}

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:e1:1
# text = Identify the gas which constitutes the greater part of the atmosphere.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	gas	gas	NOUN	NN	Number=Sing	1	obj	_	_
4	which	which	PRON	WDT	PronType=Rel	5	nsubj	_	_
5	constitutes	constitute	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	acl:relcl	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	greater	great	ADJ	JJR	Degree=Cmp	8	amod	_	_
8	part	part	NOUN	NN	Number=Sing	5	obj	_	_
9	of	of	ADP	IN	_	11	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	atmosphere	atmosphere	NOUN	NN	Number=Sing	8	nmod	_	SpaceAfter=No
12	.	.	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 gas |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent gas=Theme |
| 2 | **constitute** | present | the gas | the greater part of the atmosphere |  |  |  |  | vn comprise-107.2-1 «NP V NP»: agent=Theme part=Pivot |

<!-- .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 -->
Nitrogen

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:e1:o1:1
# text = Nitrogen
1	Nitrogen	Nitrogen	PROPN	NNP	Number=Sing	0	root	_	_
```

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

### Option 2 {#o2}

<!-- .ven lang=en -->
Oxygen

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:e1:o2:1
# text = Oxygen
1	Oxygen	oxygen	NOUN	NN	Number=Sing	0	root	_	_
```

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

### Option 3 {#o3}

<!-- .ven lang=en -->
Carbon dioxide

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:e1:o3:1
# text = Carbon dioxide
1	Carbon	carbon	NOUN	NN	Number=Sing	2	compound	_	_
2	dioxide	dioxide	NOUN	NN	Number=Sing	0	root	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
Hydrogen

```conllu
# sent_id = question:chemistry:33-the-air-we-breathe:e1:o4:1
# text = Hydrogen
1	Hydrogen	hydrogen	NOUN	NN	Number=Sing	0	root	_	_
```

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

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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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