---
title: Dad says the Earth is a magnet because there's a giant magnet stone… — Compasses and the magnetic Earth · tree and pragmatics
description: Dad says the Earth is a magnet because there's a giant magnet stone at the North Pole. True? Test 8 · ★ of lesson 30 «Compasses and the magnetic Earth» 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 right.
---

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# Test 8 · ★ · Compasses and the magnetic Earth

<!-- .ven lang=en -->
Dad says the Earth is a magnet because there's a giant magnet stone at the North Pole. True?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** Dad, Earth, giant magnet stone · **What happens:** say, be · **To what, where:** magnet · **Speech:** someone speaks here

<!-- .vabout -->
This is test 8 · ★ of lesson 30 «Compasses and the magnetic Earth» 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/30-compasses-and-the-magnetic-earth/#t8).

## The question {#question}

<!-- .note -->
*Sentence 1:* Dad says the Earth is a magnet because there's a giant magnet stone at the North Pole.

```conllu
# sent_id = question:physics:30-compasses-and-the-magnetic-earth:t8:1
# text = Dad says the Earth is a magnet because there's a giant magnet stone at the North Pole.
1	Dad	dad	NOUN	NN	Number=Sing	2	nsubj	_	_
2	says	say	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	Earth	Earth	PROPN	NNP	Number=Sing	7	nsubj	_	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	magnet	magnet	NOUN	NN	Number=Sing	2	ccomp	_	_
8	because	because	SCONJ	IN	_	10	mark	_	_
9	there	there	PRON	EX	PronType=Dem	10	expl	_	SpaceAfter=No
10	's	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	ccomp	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
12	giant	giant	ADJ	JJ	Degree=Pos	14	amod	_	_
13	magnet	magnet	NOUN	NN	Number=Sing	14	compound	_	_
14	stone	stone	NOUN	NN	Number=Sing	10	nsubj	_	_
15	at	at	ADP	IN	_	18	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	18	det	_	_
17	North	North	PROPN	NNP	Number=Sing	18	compound	_	_
18	Pole	Pole	PROPN	NNP	Number=Sing	14	nmod	_	SpaceAfter=No
19	.	.	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **say** *speech: assert* | present | Dad |  |  |  |  |  | vn say-37.7-1-1 «NP V that S»: agent=Agent clause=Topic |
| 2 | **is a** | present | the Earth | a magnet |  |  |  |  | tree rules |
| 3 | **be** | present | a giant magnet stone at the North Pole |  |  | there |  |  | vn exist-47.1 «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.

<!-- .note -->
*Sentence 2:* True?

```conllu
# sent_id = question:physics:30-compasses-and-the-magnetic-earth:t8:2
# text = True?
1	True	true	ADJ	JJ	Degree=Pos	0	root	_	SpaceAfter=No
2	?	?	PUNCT	.	_	1	punct	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

## The options {#options}

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

<!-- .ven lang=en -->
No, it comes from liquid iron moving deep in the core

```conllu
# sent_id = question:physics:30-compasses-and-the-magnetic-earth:t8:o1:1
# text = No, it comes from liquid iron moving deep in the core
1	No	no	INTJ	UH	Polarity=Neg	4	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	4	punct	_	_
3	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
4	comes	come	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	from	from	ADP	IN	_	7	case	_	_
6	liquid	liquid	ADJ	JJ	Degree=Pos	7	amod	_	_
7	iron	iron	NOUN	NN	Number=Sing	4	obl	_	_
8	moving	move	VERB	VBG	VerbForm=Ger	7	acl	_	_
9	deep	deep	ADV	RB	_	8	advmod	_	_
10	in	in	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	core	core	NOUN	NN	Number=Sing	8	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **come** | present | it |  |  | liquid iron |  |  | vn escape-51.1-1 «NP V PP.initial\_location»: agent=Theme from iron=Initial\_Location |
| 2 | **move** | gerund | liquid iron *not said here* |  |  | the core |  | deep *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme in core=Trajectory |

### Option 2 {#o2}

<!-- .ven lang=en -->
Yes, it is under the ice at the South Pole

```conllu
# sent_id = question:physics:30-compasses-and-the-magnetic-earth:t8:o2:1
# text = Yes, it is under the ice at the South Pole
1	Yes	yes	INTJ	UH	Polarity=Pos	7	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	7	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	cop	_	_
5	under	under	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	ice	ice	NOUN	NN	Number=Sing	0	root	_	_
8	at	at	ADP	IN	_	11	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	South	South	PROPN	NNP	Number=Sing	11	compound	_	_
11	Pole	Pole	PROPN	NNP	Number=Sing	7	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | it |  |  | the ice |  | at the South Pole | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
No, it is the Moon's pull that makes the whole Earth magnetic

```conllu
# sent_id = question:physics:30-compasses-and-the-magnetic-earth:t8:o3:1
# text = No, it is the Moon's pull that makes the whole Earth magnetic
1	No	no	INTJ	UH	Polarity=Neg	8	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	8	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	cop	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	Moon	Moon	PROPN	NNP	Number=Sing	8	nmod:poss	_	SpaceAfter=No
7	's	's	PART	POS	_	6	case	_	_
8	pull	pull	NOUN	NN	Number=Sing	0	root	_	_
9	that	that	PRON	WDT	PronType=Rel	10	nsubj	_	_
10	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	acl:relcl	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
12	whole	whole	ADJ	JJ	Degree=Pos	13	amod	_	_
13	Earth	Earth	PROPN	NNP	Number=Sing	10	obj	_	_
14	magnetic	magnetic	ADJ	JJ	Degree=Pos	10	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | it | the Moon's pull |  |  |  |  | tree rules |
| 2 | **make** | present | the Moon's pull | the whole Earth |  |  |  | magnetic *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset earth=Product |

### Option 4 {#o4}

<!-- .ven lang=en -->
Yes, a huge magnet rock sits there

```conllu
# sent_id = question:physics:30-compasses-and-the-magnetic-earth:t8:o4:1
# text = Yes, a huge magnet rock sits there
1	Yes	yes	INTJ	UH	Polarity=Pos	7	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
4	huge	huge	ADJ	JJ	Degree=Pos	6	amod	_	_
5	magnet	magnet	NOUN	NN	Number=Sing	6	compound	_	_
6	rock	rock	NOUN	NN	Number=Sing	7	nsubj	_	_
7	sits	sit	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	there	there	ADV	RB	PronType=Dem	7	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **sit** | present | a huge magnet rock |  |  | there |  |  | vn assuming\_position-50 «NP V»: agent=Agent |

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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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