---
title: Why are matches kept away from children? — Friction: the grip that stops and helps · tree and pragmatics
description: Why are matches kept away from children? Test 8 of lesson 6 «Friction: the grip that stops and helps» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 8 · Friction: the grip that stops and helps

<!-- .ven lang=en -->
Why are matches kept away from children?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 3 · wrong ✗ · **What happens:** be, keep away · **To what, where:** matches

<!-- .vabout -->
This is test 8 of lesson 6 «Friction: the grip that stops and helps» of the physics course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/physics/6-friction-the-grip/#t8).

## The question {#question}

```conllu
# sent_id = question:physics:6-friction-the-grip:t8:1
# text = Why are matches kept away from children?
1	Why	why	ADV	WRB	PronType=Int	3	advmod	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	matches	match	NOUN	NNS	Number=Plur	0	root	_	_
4	kept	keep	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl	_	_
5	away	away	ADV	RB	_	4	advmod	_	_
6	from	from	ADP	IN	_	7	case	_	_
7	children	child	NOUN	NNS	Number=Plur	4	obl	_	SpaceAfter=No
8	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present |  | matches |  |  |  |  | tree rules |
| 2 | **keep away** | participle |  | matches *not said here* |  |  |  | from children; away *property* | vn forbid-64.4 «NP V NP PP.theme»: agent=Causer from child=Eventuality |

<!-- .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.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
They are too heavy for children

```conllu
# sent_id = question:physics:6-friction-the-grip:t8:o1:1
# text = They are too heavy for children
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	4	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	too	too	ADV	RB	_	4	advmod	_	_
4	heavy	heavy	ADJ	JJ	Degree=Pos	0	root	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	children	child	NOUN	NNS	Number=Plur	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | They |  |  |  |  | for children; heavy *property* | tree rules |

### Option 2 {#o2}

<!-- .ven lang=en -->
They taste of chemicals

```conllu
# sent_id = question:physics:6-friction-the-grip:t8:o2:1
# text = They taste of chemicals
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	taste	taste	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	chemicals	chemical	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **taste** | present | They |  |  |  |  | of chemicals | vn stimulus\_subject-30.4 «NP V PP.attribute»: agent=Stimulus |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
One quick rub makes real fire

```conllu
# sent_id = question:physics:6-friction-the-grip:t8:o3:1
# text = One quick rub makes real fire
1	One	one	NUM	CD	NumForm=Word|NumType=Card	3	nummod	_	_
2	quick	quick	ADJ	JJ	Degree=Pos	3	amod	_	_
3	rub	rub	NOUN	NN	Number=Sing	4	nsubj	_	_
4	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	real	real	ADJ	JJ	Degree=Pos	6	amod	_	_
6	fire	fire	NOUN	NN	Number=Sing	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | One quick rub | real fire |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset fire=Product |

### Option 4 · ← Mova's choice {#o4}

<!-- .ven lang=en -->
They break too easily

```conllu
# sent_id = question:physics:6-friction-the-grip:t8:o4:1
# text = They break too easily
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	break	break	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	too	too	ADV	RB	_	4	advmod	_	_
4	easily	easily	ADV	RB	_	2	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **break** | present | They |  |  |  |  | easily *property* | vn hurt-40.8.3-1-1 «NP V»: agent=Patient |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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- ← previous: [Friction: the grip that stops and helps, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/physics/6-friction-the-grip/t7/)
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