---
title: A flask has two walls with almost no air between them, so heat can h… — Keeping warm and keeping cool: insulation and sw… · tree and pragmatics
description: A flask has two walls with almost no air between them, so heat can hardly cross, and shiny walls bounce heat rays back. Who acts: flask, heat, shiny walls. A sentence of the lesson «Keeping warm and keeping cool: insulation and sweat» of the physics course of Mova's primary school with its dependenc
---

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# Keeping warm and keeping cool: insulation and sweat, sentence 8

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A flask has two walls with almost no air between them, so heat can hardly cross, and shiny walls bounce heat rays back.

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**Who acts:** flask, heat, shiny walls · **What happens:** have, cross, bounce back · **To what, where:** two walls, heat rays

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This is a sentence of the lesson «Keeping warm and keeping cool: insulation and sweat» 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 (flask, heat, shiny walls), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:physics:025-keeping-warm-and-keeping-cool.lesson:8
# text = A flask has two walls with almost no air between them, so heat can hardly cross, and shiny walls bounce heat rays back.
# source = school lesson (ours)
# course = physics
# lesson = 025-keeping-warm-and-keeping-cool.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): R2-punct-next ×1
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	flask	flask	NOUN	NN	Number=Sing	3	nsubj	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	two	two	NUM	CD	NumForm=Word|NumType=Card	5	nummod	_	_
5	walls	wall	NOUN	NNS	Number=Plur	3	obj	_	_
6	with	with	ADP	IN	_	9	case	_	_
7	almost	almost	ADV	RB	_	9	advmod	_	_
8	no	no	DET	DT	PronType=Neg	9	det	_	_
9	air	air	NOUN	NN	Number=Sing	5	nmod	_	_
10	between	between	ADP	IN	_	11	case	_	_
11	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	9	nmod	_	_
12	,	,	PUNCT	,	_	17	punct	_	_
13	so	so	ADV	RB	_	17	advmod	_	_
14	heat	heat	NOUN	NN	Number=Sing	17	nsubj	_	_
15	can	can	AUX	MD	VerbForm=Fin	17	aux	_	_
16	hardly	hardly	ADV	RB	_	17	advmod	_	_
17	cross	cross	VERB	VB	VerbForm=Inf	3	parataxis	_	_
18	,	,	PUNCT	,	_	22	punct	_	Agree=R2-punct-next|Haiku=17:punct
19	and	and	CCONJ	CC	_	22	cc	_	_
20	shiny	shiny	ADJ	JJ	Degree=Pos	21	amod	_	_
21	walls	wall	NOUN	NNS	Number=Plur	22	nsubj	_	_
22	bounce	bounce	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	17	conj	_	_
23	heat	heat	NOUN	NN	Number=Sing	24	compound	_	_
24	rays	ray	NOUN	NNS	Number=Plur	22	obj	_	_
25	back	back	ADV	RB	_	22	advmod	_	_
26	.	.	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 | **have** | present | a flask | two walls |  |  |  | with no air between walls | vn birth-28.2-1 «NP V NP»: agent=Agent wall=Patient |
| 2 | **cross** | can | heat |  |  |  |  | hardly *property* | vn contiguous\_location-47.8-1 «NP V»: agent=Theme |
| 3 | **bounce back** | present | shiny walls | heat rays |  |  |  |  | vn run-51.3.2-2 «NP V NP»: agent=Agent ray=Agent |

<!-- .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:025-keeping-warm-and-keeping-cool.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): R2-punct-next ×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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