---
title: Dirty snow melts faster than clean snow, because the dark dirt soaks… — Melting, freezing and boiling · tree and pragmatics
description: Dirty snow melts faster than clean snow, because the dark dirt soaks up sunlight. Who acts: Dirty snow, dark dirt. A sentence of the lesson «Melting, freezing and boiling» of the physics course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Melting, freezing and boiling, sentence 16

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Dirty snow melts faster than clean snow, because the dark dirt soaks up sunlight.

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**Who acts:** Dirty snow, dark dirt · **What happens:** melt, soak up · **To what, where:** sunlight

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This is a sentence of the lesson «Melting, freezing and boiling» of the physics 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 (Dirty snow, dark dirt), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:024-melting-freezing-and-boiling.lesson:16
# text = Dirty snow melts faster than clean snow, because the dark dirt soaks up sunlight.
# source = school lesson (ours)
# course = physics
# lesson = 024-melting-freezing-and-boiling.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): R5-strong ×1, R7-rel-agree ×2
1	Dirty	dirty	ADJ	JJ	Degree=Pos	2	amod	_	_
2	snow	snow	NOUN	NN	Number=Sing	3	nsubj	_	_
3	melts	melt	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	faster	fast	ADV	RBR	Degree=Cmp	3	advmod	_	_
5	than	than	ADP	IN	_	7	case	_	_
6	clean	clean	ADJ	JJ	Degree=Pos	7	amod	_	_
7	snow	snow	NOUN	NN	Number=Sing	3	obl	_	_
8	,	,	PUNCT	,	_	13	punct	_	_
9	because	because	SCONJ	IN	_	13	mark	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
11	dark	dark	ADJ	JJ	Degree=Pos	12	amod	_	_
12	dirt	dirt	NOUN	NN	Number=Sing	13	nsubj	_	_
13	soaks	soak	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	_	Agree=R7-rel-agree|Haiku=3:conj
14	up	up	ADP	RP	_	13	compound:prt	_	Agree=R5-strong|Haiku=15:compound:prt|HaikuPos=ADP:IN:_
15	sunlight	sunlight	NOUN	NN	Number=Sing	13	obj	_	Agree=R7-rel-agree|Haiku=13:obl
16	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **melt** | present | Dirty snow |  |  |  |  | than clean snow; fast *property* | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |
| 2 | **soak up** | present | the dark dirt | sunlight |  |  |  |  | vn wipe\_manner-10.4.1 «NP V NP.source»: agent=Agent sunlight=Source |

<!-- .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:physics:024-melting-freezing-and-boiling.lesson:16`.

**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): R5-strong ×1, R7-rel-agree ×2. **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 and boiling, 15](https://md.mova.elamur.ai/free/en/corpora/school/physics/24-melting-freezing-and-boiling/15/)
- next →: [Keeping warm and keeping cool: insulat…, 0](https://md.mova.elamur.ai/free/en/corpora/school/physics/25-keeping-warm-and-keeping-cool/0/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/24-melting-freezing-and-boiling/)