---
title: Water is densest at about 4 °C, so in winter the deepest water of a… — Clever reasoning about water and matter · tree and pragmatics
description: Water is densest at about 4 °C, so in winter the deepest water of a lake is often about 4 °C while the top freezes. Who acts: Water, deepest water, top. A sentence of the lesson «Clever reasoning about water and matter» of the world course of Mova's primary school with its dependency tree and the pr
---

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# Clever reasoning about water and matter, sentence 8

<!-- .ven lang=en -->
Water is densest at about 4 °C, so in winter the deepest water of a lake is often about 4 °C while the top freezes.

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**Who acts:** Water, deepest water, top · **What happens:** be, freeze · **To what, where:** 4 ° C, 4

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This is a sentence of the lesson «Clever reasoning about water and matter» of the world 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 (Water, deepest water, top), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:world:020-reasoning-water-and-matter.lesson:8
# text = Water is densest at about 4 °C, so in winter the deepest water of a lake is often about 4 °C while the top freezes.
# source = school lesson (ours)
# course = world
# lesson = 020-reasoning-water-and-matter.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	Water	water	NOUN	NN	Number=Sing	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	densest	dense	ADJ	JJS	Degree=Sup	0	root	_	_
4	at	at	ADP	IN	_	8	case	_	_
5	about	about	ADV	RB	_	6	advmod	_	_
6	4	4	NUM	CD	NumForm=Digit|NumType=Card	8	nummod	_	_
7	°	°	NUM	CD	NumForm=Word|NumType=Card	8	nummod	_	_
8	C	c	NOUN	NN	Number=Sing	3	obl	_	_
9	,	,	PUNCT	,	_	12	punct	_	_
10	so	so	ADV	RB	_	12	advmod	_	_
11	in	in	ADP	IN	_	12	case	_	_
12	winter	winter	NOUN	NN	Number=Sing	22	obl	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
14	deepest	deep	ADJ	JJS	Degree=Sup	15	amod	_	_
15	water	water	NOUN	NN	Number=Sing	22	nsubj	_	_
16	of	of	ADP	IN	_	18	case	_	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	_	_
18	lake	lake	NOUN	NN	Number=Sing	15	nmod	_	_
19	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	22	cop	_	_
20	often	often	ADV	RB	_	21	advmod	_	_
21	about	about	ADV	RB	_	22	advmod	_	_
22	4	4	NUM	CD	NumForm=Digit|NumType=Card	3	conj	_	_
23	°	°	NUM	CD	NumForm=Word|NumType=Card	22	nummod	_	_
24	C	c	NOUN	NN	Number=Sing	23	nmod:unmarked	_	_
25	while	while	SCONJ	IN	_	28	mark	_	_
26	the	the	DET	DT	Definite=Def|PronType=Art	27	det	_	_
27	top	top	NOUN	NN	Number=Sing	28	nsubj	_	_
28	freezes	freeze	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	22	advcl	_	_
29	.	.	PUNCT	.	_	3	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 | **is** | present | Water |  |  | 4 ° C |  | dense *property* | tree rules |
| 2 | **is a** | present | the deepest water of a lake | 4 |  |  | winter | about *property* | tree rules |
| 3 | **freeze** | present | the top |  |  |  |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=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.

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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:world:020-reasoning-water-and-matter.lesson:8`.

**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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- ← previous: [Clever reasoning about water and matter, 7](https://md.mova.elamur.ai/free/en/corpora/school/world/20-reasoning-water-and-matter/7/)
- next →: [Clever reasoning about water and matter, 9](https://md.mova.elamur.ai/free/en/corpora/school/world/20-reasoning-water-and-matter/9/)
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