---
title: Evaporation happens at the surface of a liquid at any temperature, w… — Melting, freezing, boiling and condensing · tree and pragmatics
description: Evaporation happens at the surface of a liquid at any temperature, when the fastest particles escape as vapour. Who acts: Evaporation, fastest particles. A sentence of the lesson «Melting, freezing, boiling and condensing» of the chemistry course of Mova's primary school with its dependency tree and
---

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# Melting, freezing, boiling and condensing, sentence 6

<!-- .ven lang=en -->
Evaporation happens at the surface of a liquid at any temperature, when the fastest particles escape as vapour.

<!-- .vintro -->
**Who acts:** Evaporation, fastest particles · **What happens:** happen, escape · **To what, where:** surface

<!-- .vabout -->
This is a sentence of the lesson «Melting, freezing, boiling and condensing» of the chemistry course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (Evaporation, fastest particles), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:chemistry:005-melting-freezing-boiling-condensing.lesson:6
# text = Evaporation happens at the surface of a liquid at any temperature, when the fastest particles escape as vapour.
# source = school lesson (ours)
# course = chemistry
# lesson = 005-melting-freezing-boiling-condensing.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change
1	Evaporation	evaporation	NOUN	NN	Number=Sing	2	nsubj	_	_
2	happens	happen	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	at	at	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	surface	surface	NOUN	NN	Number=Sing	2	obl	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	liquid	liquid	NOUN	NN	Number=Sing	5	nmod	_	_
9	at	at	ADP	IN	_	11	case	_	_
10	any	any	DET	DT	PronType=Ind	11	det	_	_
11	temperature	temperature	NOUN	NN	Number=Sing	2	obl	_	_
12	,	,	PUNCT	,	_	17	punct	_	_
13	when	when	ADV	WRB	PronType=Int	17	advmod	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
15	fastest	fast	ADJ	JJS	Degree=Sup	16	amod	_	_
16	particles	particle	NOUN	NNS	Number=Plur	17	nsubj	_	_
17	escape	escape	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	advcl	_	_
18	as	as	ADP	IN	_	19	case	_	_
19	vapour	vapour	NOUN	NN	Number=Sing	17	obl	_	_
20	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- .note -->
No stored speech act for this sentence.

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | present | Evaporation |  |  | the surface of a liquid |  | at any temperature | vn occur-48.3-1 «NP V PP»: agent=Theme at surface=Location |
| 2 | **escape** | present | the fastest particles |  |  |  |  | as vapour | vn escape-51.1-1-1 «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.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:chemistry:005-melting-freezing-boiling-condensing.lesson:6`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): no change. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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