---
title: Why is a thin layer found all over the world such good evidence? — The end of the dinosaurs, and birds as… · tree and pragmatics
description: Why is a thin layer found all over the world such good evidence? Test 7 · ★★ of lesson 76 «The end of the dinosaurs, and birds as living dinosaurs» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 7 · ★★ · The end of the dinosaurs, and birds as living dinosaurs

<!-- .ven lang=en -->
Why is a thin layer found all over the world such good evidence?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** thin layer · **What happens:** be, find · **To what, where:** thin layer, world

<!-- .vabout -->
This is test 7 · ★★ of lesson 76 «The end of the dinosaurs, and birds as living dinosaurs» of the biology 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/biology/76-end-of-the-dinosaurs-and-birds/#t7).

## The question {#question}

```conllu
# sent_id = question:biology:76-end-of-the-dinosaurs-and-birds:t7:1
# text = Why is a thin layer found all over the world such good evidence?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	thin	thin	ADJ	JJ	Degree=Pos	5	amod	_	_
5	layer	layer	NOUN	NN	Number=Sing	6	nsubj	_	_
6	found	find	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
7	all	all	ADV	RB	_	10	advmod	_	_
8	over	over	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	world	world	NOUN	NN	Number=Sing	6	obl	_	_
11	such	such	ADJ	JJ	Degree=Pos	13	amod	_	_
12	good	good	ADJ	JJ	Degree=Pos	13	amod	_	_
13	evidence	evidence	NOUN	NN	Number=Sing	10	conj	_	SpaceAfter=No
14	?	?	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present |  | a thin layer |  |  |  |  | tree rules |
| 2 | **find** | past | a thin layer |  |  | the world and such good evidence |  |  | vn declare-29.4-1-1 «NP V what S\_INF»: agent=Agent |

<!-- .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 {#o1}

<!-- .ven lang=en -->
It shows the layer was painted on later

```conllu
# sent_id = question:biology:76-end-of-the-dinosaurs-and-birds:t7:o1:1
# text = It shows the layer was painted on later
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	shows	show	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	layer	layer	NOUN	NN	Number=Sing	6	nsubj:pass	_	_
5	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	6	aux:pass	_	_
6	painted	paint	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	ccomp	_	_
7	on	on	ADP	RP	_	6	compound:prt	_	_
8	later	late	ADV	RBR	Degree=Cmp	2	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **show** | present | It |  |  |  |  | late *property* | vn transfer\_mesg-37.1.1-1-1 «NP V how S»: agent=Agent clause=Topic |
| 2 | **paint on** | past · passive |  | the layer |  |  |  |  | vn image\_impression-25.1 «NP V NP.destination»: subject=Destination |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
It shows one event touched the whole planet at the same time

```conllu
# sent_id = question:biology:76-end-of-the-dinosaurs-and-birds:t7:o2:1
# text = It shows one event touched the whole planet at the same time
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	shows	show	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	one	one	NUM	CD	NumForm=Word|NumType=Card	4	nummod	_	_
4	event	event	NOUN	NN	Number=Sing	5	nsubj	_	_
5	touched	touch	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	2	ccomp	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	whole	whole	ADJ	JJ	Degree=Pos	8	amod	_	_
8	planet	planet	NOUN	NN	Number=Sing	5	obj	_	_
9	at	at	ADP	IN	_	12	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
11	same	same	ADJ	JJ	Degree=Pos	12	amod	_	_
12	time	time	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **show** | present | It |  |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V how S»: agent=Agent clause=Topic |
| 2 | **touch** | past | one event | the whole planet |  |  | time |  | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme planet=Co-Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
It proves the asteroid was made of clay

```conllu
# sent_id = question:biology:76-end-of-the-dinosaurs-and-birds:t7:o3:1
# text = It proves the asteroid was made of clay
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	proves	prove	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	asteroid	asteroid	NOUN	NN	Number=Sing	6	nsubj:pass	_	_
5	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	6	aux:pass	_	_
6	made	make	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	ccomp	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	clay	clay	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **prove** | present | It |  |  |  |  |  | vn declare-29.4-1-1 «NP V what S\_INF»: agent=Agent clause=Theme |
| 2 | **make** | past · passive |  | the asteroid |  |  |  | of clay | vn build-26.1-1 «NP.asset V NP»: subject=Product |

### Option 4 {#o4}

<!-- .ven lang=en -->
It shows each country was hit by its own small asteroid at a different time

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:biology:76-end-of-the-dinosaurs-and-birds:t7:o4:1
# text = It shows each country was hit by its own small asteroid at a different time
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	shows	show	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	each	each	DET	DT	PronType=Tot	4	det	_	_
4	country	country	NOUN	NN	Number=Sing	6	nsubj:pass	_	_
5	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	6	aux:pass	_	_
6	hit	hit	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	ccomp	_	_
7	by	by	ADP	IN	_	11	case	_	_
8	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	11	nmod:poss	_	_
9	own	own	ADJ	JJ	Degree=Pos	11	amod	_	_
10	small	small	ADJ	JJ	Degree=Pos	11	amod	_	_
11	asteroid	asteroid	NOUN	NN	Number=Sing	6	obl	_	_
12	at	at	ADP	IN	_	15	case	_	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	15	det	_	_
14	different	different	ADJ	JJ	Degree=Pos	15	amod	_	_
15	time	time	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **show** | present | It |  |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V how S»: agent=Agent clause=Topic |
| 2 | **hit** | past · passive | country's own small asteroid | each country |  |  | time |  | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme subject=Co-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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