---
title: Why do scientists want samples from asteroids like Bennu? — Asteroids and the asteroid belt · tree and pragmatics
description: Why do scientists want samples from asteroids like Bennu? Test 7 · ★★ of lesson 9 «Asteroids and the asteroid belt» of the space 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 7 · ★★ · Asteroids and the asteroid belt

<!-- .ven lang=en -->
Why do scientists want samples from asteroids like Bennu?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** scientists · **What happens:** want · **To what, where:** samples, asteroids

<!-- .vabout -->
This is test 7 · ★★ of lesson 9 «Asteroids and the asteroid belt» of the space 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/space/9-asteroids-and-the-asteroid-belt/#t7).

## The question {#question}

```conllu
# sent_id = question:space:9-asteroids-and-the-asteroid-belt:t7:1
# text = Why do scientists want samples from asteroids like Bennu?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	scientists	scientist	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	want	want	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
5	samples	sample	NOUN	NNS	Number=Plur	4	obj	_	_
6	from	from	ADP	IN	_	7	case	_	_
7	asteroids	asteroid	NOUN	NNS	Number=Plur	4	obl	_	_
8	like	like	ADP	IN	_	9	case	_	_
9	Bennu	Bennu	PROPN	NNP	Number=Sing	7	nmod	_	SpaceAfter=No
10	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **want** | present · do-support | scientists | samples |  | asteroids like Bennu |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot sample=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.

## The options {#options}

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

<!-- .ven lang=en -->
They are almost unchanged leftovers from the birth of the Solar System

```conllu
# sent_id = question:space:9-asteroids-and-the-asteroid-belt:t7:o1:1
# text = They are almost unchanged leftovers from the birth of the Solar System
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	5	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	almost	almost	ADV	RB	_	4	advmod	_	_
4	unchanged	unchanged	ADJ	JJ	Degree=Pos	5	amod	_	_
5	leftovers	leftover	NOUN	NNS	Number=Plur	0	root	_	_
6	from	from	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	birth	birth	NOUN	NN	Number=Sing	5	nmod	_	_
9	of	of	ADP	IN	_	12	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
11	Solar	Solar	PROPN	NNP	Number=Sing	12	compound	_	_
12	System	System	PROPN	NNP	Number=Sing	8	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | They | unchanged leftovers |  | the birth of the Solar System |  |  | tree rules |

### Option 2 {#o2}

<!-- .ven lang=en -->
They contain living creatures

```conllu
# sent_id = question:space:9-asteroids-and-the-asteroid-belt:t7:o2:1
# text = They contain living creatures
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	contain	contain	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	living	live	VERB	VBG	VerbForm=Ger	4	amod	_	_
4	creatures	creature	NOUN	NNS	Number=Plur	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **contain** | present | They | living creatures |  |  |  |  | vn comprise-107.2-2 «NP V NP»: agent=Pivot creature=Theme |
| 2 | **live** | gerund |  |  |  |  |  |  | vn exist-47.1-1 «NP V»: agent=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
They will make the Earth bigger

```conllu
# sent_id = question:space:9-asteroids-and-the-asteroid-belt:t7:o3:1
# text = They will make the Earth bigger
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
2	will	will	AUX	MD	VerbForm=Fin	3	aux	_	_
3	make	make	VERB	VB	VerbForm=Inf	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	Earth	Earth	PROPN	NNP	Number=Sing	3	obj	_	_
6	bigger	big	ADJ	JJR	Degree=Cmp	3	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | future | They | the Earth |  |  |  | big *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset earth=Product |

### Option 4 {#o4}

<!-- .ven lang=en -->
They are made of melted planets

```conllu
# sent_id = question:space:9-asteroids-and-the-asteroid-belt:t7:o4:1
# text = They are made of melted planets
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	melted	melt	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	6	amod	_	_
6	planets	planet	NOUN	NNS	Number=Plur	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present · passive |  | They |  |  |  | of melted planets | vn build-26.1-1 «NP.asset V NP»: subject=Product |
| 2 | **melt** | participle |  |  |  |  |  |  | vn other\_cos-45.4-1 «NP.patient 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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