---
title: You keep a nail in a sealed jar with a packet of drying crystals, wh… — Rust: iron's slow fire · tree and pragmatics
description: You keep a nail in a sealed jar with a packet of drying crystals, which soak up any water. What will happen? Test 2 of lesson 13 «Rust: iron's slow fire» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wr
---

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# Test 2 · Rust: iron's slow fire

<!-- .ven lang=en -->
You keep a nail in a sealed jar with a packet of drying crystals, which soak up any water. What will happen?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **Who acts:** You, drying crystals · **What happens:** keep, seal, dry, soak up, happen · **To what, where:** nail, sealed jar, water

<!-- .vabout -->
This is test 2 of lesson 13 «Rust: iron's slow fire» of the chemistry 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/chemistry/13-rust-irons-slow-fire/#t2).

## The question {#question}

<!-- .note -->
*Sentence 1:* You keep a nail in a sealed jar with a packet of drying crystals, which soak up any water.

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t2:1
# text = You keep a nail in a sealed jar with a packet of drying crystals, which soak up any water.
1	You	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	2	nsubj	_	_
2	keep	keep	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	0	root	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	nail	nail	NOUN	NN	Number=Sing	2	obj	_	_
5	in	in	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	sealed	seal	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	8	amod	_	_
8	jar	jar	NOUN	NN	Number=Sing	2	obl	_	_
9	with	with	ADP	IN	_	11	case	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	_	_
11	packet	packet	NOUN	NN	Number=Sing	2	obl	_	_
12	of	of	ADP	IN	_	14	case	_	_
13	drying	dry	VERB	VBG	VerbForm=Ger	14	amod	_	_
14	crystals	crystal	NOUN	NNS	Number=Plur	11	nmod	_	SpaceAfter=No
15	,	,	PUNCT	,	_	17	punct	_	_
16	which	which	PRON	WDT	PronType=Rel	17	nsubj	_	_
17	soak	soak	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	14	acl:relcl	_	_
18	up	up	ADP	RP	_	17	compound:prt	_	_
19	any	any	DET	DT	PronType=Ind	20	det	_	_
20	water	water	NOUN	NN	Number=Sing	17	obj	_	SpaceAfter=No
21	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | You | a nail |  | a sealed jar |  | with a packet of drying crystals | vn keep-15.2 «NP V NP PP.location»: agent=Agent nail=Theme in jar=Location |
| 2 | **seal** | participle |  |  |  |  |  |  | vn tape-22.4 «NP V ADV-Middle»: agent=Patient |
| 3 | **dry** | gerund |  |  |  |  |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |
| 4 | **soak up** | present | drying crystals | any water |  |  |  |  | vn wipe\_manner-10.4.1 «NP V NP.source»: agent=Agent water=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.

<!-- .note -->
*Sentence 2:* What will happen?

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t2:2
# text = What will happen?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	will	will	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
4	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | future |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
It will rust even faster than a nail left out in the rain

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t2:o1:1
# text = It will rust even faster than a nail left out in the rain
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	will	will	AUX	MD	VerbForm=Fin	3	aux	_	_
3	rust	rust	VERB	VB	VerbForm=Inf	0	root	_	_
4	even	even	ADV	RB	_	5	advmod	_	_
5	faster	fast	ADV	RBR	Degree=Cmp	3	advmod	_	_
6	than	than	ADP	IN	_	8	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	nail	nail	NOUN	NN	Number=Sing	5	obl	_	_
9	left	leave	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	8	acl	_	_
10	out	out	ADP	RP	_	9	compound:prt	_	_
11	in	in	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	rain	rain	NOUN	NN	Number=Sing	9	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rust** | future | It |  |  |  |  | fast *property* | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |
| 2 | **leave out** | participle |  | a nail *not said here* |  | the rain |  |  | vn neglect-75.1 «NP V NP»: agent=Agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
It will turn green like copper

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t2:o2:1
# text = It will turn green like copper
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	will	will	AUX	MD	VerbForm=Fin	3	aux	_	_
3	turn	turn	VERB	VB	VerbForm=Inf	0	root	_	_
4	green	green	ADJ	JJ	Degree=Pos	3	xcomp	_	_
5	like	like	ADP	IN	_	6	case	_	_
6	copper	copper	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | future | It |  |  |  |  | like copper; green *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
It will rust only at night

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t2:o3:1
# text = It will rust only at night
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	will	will	AUX	MD	VerbForm=Fin	3	aux	_	_
3	rust	rust	VERB	VB	VerbForm=Inf	0	root	_	_
4	only	only	ADV	RB	_	3	advmod	_	_
5	at	at	ADP	IN	_	6	case	_	_
6	night	night	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rust** | future | It |  |  |  | night |  | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
It will hardly rust, because there is no water

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t2:o4:1
# text = It will hardly rust, because there is no water
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
2	will	will	AUX	MD	VerbForm=Fin	4	aux	_	_
3	hardly	hardly	ADV	RB	_	4	advmod	_	_
4	rust	rust	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
5	,	,	PUNCT	,	_	8	punct	_	_
6	because	because	SCONJ	IN	_	8	mark	_	_
7	there	there	PRON	EX	PronType=Dem	8	expl	_	_
8	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	advcl	_	_
9	no	no	DET	DT	PronType=Neg	10	det	_	_
10	water	water	NOUN	NN	Number=Sing	8	nsubj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **rust** | future | It |  |  |  |  | hardly *property* | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |
| 2 | **be** | present | no water |  |  | there |  |  | vn exist-47.1 «NP V»: agent=Theme |

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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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