---
title: A space game says Mars is red because it is covered in lava. What's… — Rust: iron's slow fire · tree and pragmatics
description: A space game says Mars is red because it is covered in lava. What's the real reason? Test 11 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 right.
---

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# Test 11 · Rust: iron's slow fire

<!-- .ven lang=en -->
A space game says Mars is red because it is covered in lava. What's the real reason?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** space game, Mars, real reason · **What happens:** say, be, cover · **To what, where:** game · **Speech:** someone speaks here

<!-- .vabout -->
This is test 11 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/#t11).

## The question {#question}

<!-- .note -->
*Sentence 1:* A space game says Mars is red because it is covered in lava.

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t11:1
# text = A space game says Mars is red because it is covered in lava.
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	space	space	NOUN	NN	Number=Sing	3	compound	_	_
3	game	game	NOUN	NN	Number=Sing	4	nsubj	_	_
4	says	say	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	Mars	Mars	PROPN	NNP	Number=Sing	7	nsubj	_	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
7	red	red	ADJ	JJ	Degree=Pos	4	ccomp	_	_
8	because	because	SCONJ	IN	_	11	mark	_	_
9	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	nsubj:pass	_	_
10	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	aux:pass	_	_
11	covered	cover	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	7	advcl	_	_
12	in	in	ADP	IN	_	13	case	_	_
13	lava	lava	NOUN	NN	Number=Sing	11	obl	_	SpaceAfter=No
14	.	.	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **say** *speech: assert* | present | a space game |  |  |  |  |  | vn say-37.7-1-1 «NP V that S»: agent=Agent |
| 2 | **is** | present | Mars |  |  |  |  | red *property* | tree rules |
| 3 | **cover** | present · passive |  | game |  |  |  | in lava | vn fill-9.8-1 «NP V NP PP.theme»: subject=Destination in lava=Theme |

<!-- .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's the real reason?

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t11:2
# text = What's the real reason?
1	What	what	PRON	WP	PronType=Int	0	root	_	SpaceAfter=No
2	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	cop	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	real	real	ADJ	JJ	Degree=Pos	5	amod	_	_
5	reason	reason	NOUN	NN	Number=Sing	1	nsubj	_	SpaceAfter=No
6	?	?	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the real reason |  |  |  |  |  | tree rules |

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Its dust contains iron oxide, like rust

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t11:o1:1
# text = Its dust contains iron oxide, like rust
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	dust	dust	NOUN	NN	Number=Sing	3	nsubj	_	_
3	contains	contain	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	iron	iron	NOUN	NN	Number=Sing	5	compound	_	_
5	oxide	oxide	NOUN	NN	Number=Sing	3	obj	_	SpaceAfter=No
6	,	,	PUNCT	,	_	8	punct	_	_
7	like	like	ADP	IN	_	8	case	_	_
8	rust	rust	NOUN	NN	Number=Sing	5	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **contain** | present | Its dust | iron oxide and rust |  |  |  |  | vn comprise-107.2-2 «NP V NP»: agent=Pivot oxide=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
It is covered in red sea water

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t11:o2:1
# text = It is covered in red sea water
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	covered	cover	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	in	in	ADP	IN	_	7	case	_	_
5	red	red	ADJ	JJ	Degree=Pos	7	amod	_	_
6	sea	sea	NOUN	NN	Number=Sing	7	compound	_	_
7	water	water	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cover** | present · passive |  | It |  |  |  | in red sea water | vn fill-9.8-1 «NP V NP PP.theme»: subject=Destination in water=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
It has red trees and plants

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t11:o3:1
# text = It has red trees and plants
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	red	red	ADJ	JJ	Degree=Pos	4	amod	_	_
4	trees	tree	NOUN	NNS	Number=Plur	2	obj	_	_
5	and	and	CCONJ	CC	_	6	cc	_	_
6	plants	plant	NOUN	NNS	Number=Plur	4	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | It | red trees and plants |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent tree=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
It is glowing red-hot all the time

```conllu
# sent_id = question:chemistry:13-rust-irons-slow-fire:t11:o4:1
# text = It is glowing red-hot all the time
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux	_	_
3	glowing	glow	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	_	_
4	red	red	ADJ	JJ	Degree=Pos	6	amod	_	SpaceAfter=No
5	-	-	PUNCT	HYPH	_	4	punct	_	SpaceAfter=No
6	hot	hot	ADJ	JJ	Degree=Pos	3	xcomp	_	_
7	all	all	DET	PDT	PronType=Tot	9	det:predet	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	time	time	NOUN	NN	Number=Sing	3	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **glow** | present · progressive | It |  |  |  | time | hot *property* | vn light\_emission-43.1 «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.

<!-- /div -->

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