---
title: Salt makes ice melt below 0 °C, because salty water freezes at a low… — Melting, freezing, boiling and condensing · tree and pragmatics
description: Salt makes ice melt below 0 °C, because salty water freezes at a lower temperature; it stops working well in very hard frost. Who acts: Salt, 0, salty water, Water. A sentence of the lesson «Melting, freezing, boiling and condensing» of the chemistry course of Mova's primary school with its dependen
---

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# Melting, freezing, boiling and condensing, sentence 15

<!-- .ven lang=en -->
Salt makes ice melt below 0 °C, because salty water freezes at a lower temperature; it stops working well in very hard frost.

<!-- .vintro -->
**Who acts:** Salt, 0, salty water, Water · **What happens:** make, melt, freeze, stop, work · **To what, where:** 0, ice, lower temperature

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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 (Salt, 0, salty water, Water), 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:15
# text = Salt makes ice melt below 0 °C, because salty water freezes at a lower temperature; it stops working well in very hard frost.
# 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): R7-rel-agree ×1, R8-pos-agree ×1
1	Salt	salt	NOUN	NN	Number=Sing	2	nsubj	_	Agree=R8-pos-agree|Haiku=2:nsubj|HaikuPos=PROPN:NNP:Number=Sing
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	ice	ice	NOUN	NN	Number=Sing	4	obj	_	_
4	melt	melt	VERB	VB	VerbForm=Inf	2	xcomp	_	_
5	below	below	ADV	RB	_	6	advmod	_	_
6	0	0	NUM	CD	NumForm=Digit|NumType=Card	2	obl	_	_
7	°	°	NUM	CD	NumForm=Word|NumType=Card	6	list	_	_
8	C	c	NOUN	NN	Number=Sing	7	nmod:unmarked	_	_
9	,	,	PUNCT	,	_	13	punct	_	_
10	because	because	SCONJ	IN	_	13	mark	_	_
11	salty	salty	ADJ	JJ	Degree=Pos	12	amod	_	_
12	water	water	NOUN	NN	Number=Sing	13	nsubj	_	_
13	freezes	freeze	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
14	at	at	ADP	IN	_	17	case	_	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
16	lower	low	ADJ	JJR	Degree=Cmp	17	amod	_	_
17	temperature	temperature	NOUN	NN	Number=Sing	13	obl	_	_
18	;	;	PUNCT	:	_	20	punct	_	_
19	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	20	nsubj	_	_
20	stops	stop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	parataxis	_	Agree=R7-rel-agree|Haiku=2:conj
21	working	work	VERB	VBG	VerbForm=Ger	20	xcomp	_	_
22	well	well	ADV	RB	Degree=Pos	21	advmod	_	_
23	in	in	ADP	IN	_	26	case	_	_
24	very	very	ADV	RB	_	25	advmod	_	_
25	hard	hard	ADJ	JJ	Degree=Pos	26	amod	_	_
26	frost	frost	NOUN	NN	Number=Sing	21	obl	_	_
27	.	.	PUNCT	.	_	2	punct	_	_
```

## Pragmatics {#pragmatics}

<!-- sa -->
- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Salt | 0 |  |  |  |  | tree rules |
| 2 | **melt** | infinitive | 0 *not said here* | ice |  |  |  |  | vn other\_cos-45.4-1 «NP V NP ADJ»: agent=Patient ice=Result |
| 3 | **freeze** | present | salty water |  |  | a lower temperature |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |
| 4 | **stop** | present | Water |  |  |  |  |  | vn stop-55.4-1-1 «NP V S\_ING»: agent=Affector clause=Eventuality |
| 5 | **work** | gerund | Water *not said here* |  |  |  |  | in hard frost; well *property* | vn employment-95.3 «NP V PP.theme»: agent=Agent in frost=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:15`.

**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): R7-rel-agree ×1, R8-pos-agree ×1. **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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- ← previous: [Melting, freezing, boiling and condens…, 14](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/5-melting-freezing-boiling-condensing/14/)
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