---
title: Dirty snow melts faster than clean snow in the Sun, because the dark… — Olympiad: sound, light, heat, electricity and ma… · tree and pragmatics
description: Dirty snow melts faster than clean snow in the Sun, because the dark dirt soaks up sunlight while white snow bounces it away. Who acts: Dirty snow, dark dirt, white snow. A sentence of the lesson «Olympiad: sound, light, heat, electricity and magnets ★★★» of the physics course of Mova's primary scho
---

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# Olympiad: sound, light, heat, electricity and magnets ★★★, sentence 17

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Dirty snow melts faster than clean snow in the Sun, because the dark dirt soaks up sunlight while white snow bounces it away.

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

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This is a sentence of the lesson «Olympiad: sound, light, heat, electricity and magnets ★★★» 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, white snow), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:043-olympiad-sound-light-heat-and-magnets.lesson:17
# text = Dirty snow melts faster than clean snow in the Sun, because the dark dirt soaks up sunlight while white snow bounces it away.
# source = school lesson (ours)
# course = physics
# lesson = 043-olympiad-sound-light-heat-and-magnets.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 ×1, R8-pos-agree ×1
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	4	obl	_	_
8	in	in	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	Sun	Sun	PROPN	NNP	Number=Sing	3	obl	_	_
11	,	,	PUNCT	,	_	16	punct	_	_
12	because	because	SCONJ	IN	_	16	mark	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
14	dark	dark	ADJ	JJ	Degree=Pos	15	amod	_	_
15	dirt	dirt	NOUN	NN	Number=Sing	16	nsubj	_	_
16	soaks	soak	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	_	Agree=R7-rel-agree|Haiku=3:conj
17	up	up	ADP	RP	_	16	compound:prt	_	Agree=R8-pos-agree|Haiku=16:compound:prt|HaikuPos=PART:RP:_
18	sunlight	sunlight	NOUN	NN	Number=Sing	16	obj	_	_
19	while	while	SCONJ	IN	_	22	mark	_	_
20	white	white	ADJ	JJ	Degree=Pos	21	amod	_	Agree=R5-strong|Haiku=22:amod
21	snow	snow	NOUN	NN	Number=Sing	22	nsubj	_	_
22	bounces	bounce	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	advcl	_	_
23	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	22	obj	_	_
24	away	away	ADV	RB	_	22	advmod	_	_
25	.	.	PUNCT	.	_	3	punct	_	_
```

## Pragmatics {#pragmatics}

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No stored speech act for this sentence.

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **melt** | present | Dirty snow |  |  | the Sun |  | 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 |
| 3 | **bounce away** | present | white snow | Sunlight |  |  |  | away *property* | vn run-51.3.2-2 «NP V NP»: agent=Agent it=Theme |

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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:043-olympiad-sound-light-heat-and-magnets.lesson:17`.

**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 ×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: [Olympiad: sound, light, heat, electric…, 16](https://md.mova.elamur.ai/free/en/corpora/school/physics/43-olympiad-sound-light-heat-and-magnets/16/)
- next →: [Olympiad: speed, space and seasons ★★★, 0](https://md.mova.elamur.ai/free/en/corpora/school/physics/44-olympiad-speed-space-and-seasons/0/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/43-olympiad-sound-light-heat-and-magnets/)