---
title: Identify the principal reason for which evaporation of water from th… — Melting, freezing, boiling and condens… · tree and pragmatics
description: Identify the principal reason for which evaporation of water from the skin produces a sensation of cold. Exam question 4 of lesson 5 «Melting, freezing, boiling and condensing» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each optio
---

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# Exam question 4 · Melting, freezing, boiling and condensing

<!-- .ven lang=en -->
Identify the principal reason for which evaporation of water from the skin produces a sensation of cold.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, principal reason · **What happens:** identify, produce, evaporate · **To what, where:** principal reason, sensation, skin, water

<!-- .vabout -->
This is exam question 4 of lesson 5 «Melting, freezing, boiling and condensing» 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/5-melting-freezing-boiling-condensing/#e4).

## The question {#question}

```conllu
# sent_id = question:chemistry:5-melting-freezing-boiling-condensing:e4:1
# text = Identify the principal reason for which evaporation of water from the skin produces a sensation of cold.
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	_	7	case	_	_
6	which	which	DET	WDT	PronType=Int	7	det	_	_
7	evaporation	evaporation	NOUN	NN	Number=Sing	4	nmod	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	water	water	NOUN	NN	Number=Sing	7	nmod	_	_
10	from	from	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	skin	skin	NOUN	NN	Number=Sing	13	obl	_	_
13	produces	produce	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	acl	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	15	det	_	_
15	sensation	sensation	NOUN	NN	Number=Sing	13	obj	_	_
16	of	of	ADP	IN	_	17	case	_	_
17	cold	cold	ADJ	JJ	Degree=Pos	15	nmod	_	SpaceAfter=No
18	.	.	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 |  |  |  | for which evaporation of water | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **produce** | present | the principal reason *not said here* | a sensation of cold |  | the skin |  |  | vn create-26.4 «NP V NP PP.material»: agent=Agent sensation=Result from skin=Material |
| 3 | **evaporate** |  |  | water |  |  |  |  | nom evaporation «process transitive»: of=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 -->
Water is invariably colder than the skin

```conllu
# sent_id = question:chemistry:5-melting-freezing-boiling-condensing:e4:o1:1
# text = Water is invariably colder than the skin
1	Water	water	NOUN	NN	Number=Sing	4	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	invariably	invariably	ADV	RB	_	4	advmod	_	_
4	colder	cold	ADJ	JJR	Degree=Cmp	0	root	_	_
5	than	than	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	skin	skin	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Water |  |  |  |  | than the skin; cold, invariably *property* | tree rules |

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

<!-- .ven lang=en -->
The escaping particles carry heat away from the body

```conllu
# sent_id = question:chemistry:5-melting-freezing-boiling-condensing:e4:o2:1
# text = The escaping particles carry heat away from the body
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	escaping	escape	VERB	VBG	VerbForm=Ger	3	amod	_	_
3	particles	particle	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	carry	carry	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	heat	heat	NOUN	NN	Number=Sing	4	obj	_	_
6	away	away	ADV	RB	_	4	advmod	_	_
7	from	from	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	body	body	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **escape** | gerund |  |  |  |  |  |  | vn escape-51.1-1-1 «NP V»: agent=Theme |
| 2 | **carry away** | present | the escaping particles | heat |  | the body |  | away *property* | vn carry-11.4 «NP V NP PP.initial\_location»: agent=Agent heat=Theme from body=Initial\_Location |

### Option 3 {#o3}

<!-- .ven lang=en -->
Evaporation introduces cold air into the skin

```conllu
# sent_id = question:chemistry:5-melting-freezing-boiling-condensing:e4:o3:1
# text = Evaporation introduces cold air into the skin
1	Evaporation	evaporation	NOUN	NN	Number=Sing	2	nsubj	_	_
2	introduces	introduce	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	cold	cold	ADJ	JJ	Degree=Pos	4	amod	_	_
4	air	air	NOUN	NN	Number=Sing	2	obj	_	_
5	into	into	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	skin	skin	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **introduce** | present | Evaporation | cold air |  | the skin |  |  | vn amalgamate-22.2-3-1 «NP V NP»: agent=Agent air=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The skin produces cold in response to moisture

```conllu
# sent_id = question:chemistry:5-melting-freezing-boiling-condensing:e4:o4:1
# text = The skin produces cold in response to moisture
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	skin	skin	NOUN	NN	Number=Sing	3	nsubj	_	_
3	produces	produce	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	cold	cold	ADJ	JJ	Degree=Pos	3	xcomp	_	_
5	in	in	ADP	IN	_	6	case	_	_
6	response	response	NOUN	NN	Number=Sing	3	obl	_	_
7	to	to	ADP	IN	_	8	case	_	_
8	moisture	moisture	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **produce** | present | the skin |  |  | response to moisture |  | cold *property* | vn create-26.4 «NP V NP»: agent=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.

<!-- /div -->

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