---
title: What would happen if the Earth's magnetic field disappeared? — The Earth as a planet · tree and pragmatics
description: What would happen if the Earth's magnetic field disappeared? Test 5 of lesson 5 «The Earth as a planet» 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 5 · The Earth as a planet

<!-- .ven lang=en -->
What would happen if the Earth's magnetic field disappeared?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** magnetic field · **What happens:** happen, disappear

<!-- .vabout -->
This is test 5 of lesson 5 «The Earth as a planet» 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/5-the-earth-as-a-planet/#t5).

## The question {#question}

```conllu
# sent_id = question:space:5-the-earth-as-a-planet:t5:1
# text = What would happen if the Earth's magnetic field disappeared?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	if	if	SCONJ	IN	_	10	mark	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	Earth	Earth	PROPN	NNP	Number=Sing	9	nmod:poss	_	SpaceAfter=No
7	's	's	PART	POS	_	6	case	_	_
8	magnetic	magnetic	ADJ	JJ	Degree=Pos	9	amod	_	_
9	field	field	NOUN	NN	Number=Sing	10	nsubj	_	_
10	disappeared	disappear	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	advcl	_	SpaceAfter=No
11	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **disappear** *a condition, not said to happen* | participle | the Earth's magnetic field |  |  |  |  |  | vn disappearance-48.2-1 «NP V»: agent=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 -->
More of the solar wind would reach the atmosphere and wear it away over time

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:space:5-the-earth-as-a-planet:t5:o1:1
# text = More of the solar wind would reach the atmosphere and wear it away over time
1	More	more	ADJ	JJR	Degree=Cmp	5	amod	_	_
2	of	of	ADP	IN	_	5	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	solar	solar	ADJ	JJ	Degree=Pos	5	amod	_	_
5	wind	wind	NOUN	NN	Number=Sing	7	nsubj	_	_
6	would	would	AUX	MD	VerbForm=Fin	7	aux	_	_
7	reach	reach	VERB	VB	VerbForm=Inf	0	root	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	atmosphere	atmosphere	NOUN	NN	Number=Sing	7	obj	_	_
10	and	and	CCONJ	CC	_	11	cc	_	_
11	wear	wear	VERB	VB	VerbForm=Inf	7	conj	_	_
12	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	obj	_	_
13	away	away	ADV	RB	_	11	advmod	_	_
14	over	over	ADP	IN	_	15	case	_	_
15	time	time	NOUN	NN	Number=Sing	11	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **reach** | would | the More solar wind | the atmosphere |  |  |  |  | vn body\_motion-49.2-1-1 «NP V NP ADV»: agent=Agent atmosphere=Theme |
| 2 | **wear away** | infinitive | the More solar wind *not said here* | atmosphere |  |  | time | away *property* | vn wipe\_manner-10.4.1-1 «NP V NP.theme»: agent=Agent it=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The Earth would stop spinning at once

```conllu
# sent_id = question:space:5-the-earth-as-a-planet:t5:o2:1
# text = The Earth would stop spinning at once
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Earth	Earth	PROPN	NNP	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	stop	stop	VERB	VB	VerbForm=Inf	0	root	_	_
5	spinning	spin	VERB	VBG	VerbForm=Ger	4	xcomp	_	_
6	at	at	ADP	IN	_	7	case	_	_
7	once	once	ADV	RB	NumForm=Word|NumType=Mult	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stop** | would | the Earth |  |  |  |  |  | vn stop-55.4-1-1 «NP V S\_ING»: agent=Affector clause=Eventuality |
| 2 | **spin** | gerund | the Earth *not said here* |  |  |  |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme at once=Trajectory |

### Option 3 {#o3}

<!-- .ven lang=en -->
We would float off the ground

```conllu
# sent_id = question:space:5-the-earth-as-a-planet:t5:o3:1
# text = We would float off the ground
1	We	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	float	float	VERB	VB	VerbForm=Inf	0	root	_	_
4	off	off	ADP	RP	_	3	compound:prt	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	ground	ground	NOUN	NN	Number=Sing	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **float off** | would | We | the ground |  |  |  |  | vn run-51.3.2-2 «NP V NP»: agent=Agent ground=Agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
The Moon would fall down

```conllu
# sent_id = question:space:5-the-earth-as-a-planet:t5:o4:1
# text = The Moon would fall down
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	fall	fall	VERB	VB	VerbForm=Inf	0	root	_	_
5	down	down	ADV	RB	_	4	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fall down** | would | the Moon |  |  |  |  | down *property* | vn occur-48.3 «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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- ← previous: [The Earth as a planet, test 4](https://md.mova.elamur.ai/free/en/corpora/questions/space/5-the-earth-as-a-planet/t4/)
- next →: [The Earth as a planet, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/space/5-the-earth-as-a-planet/t6/)
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