---
title: A muddy river reaches a calm lake and the water clears. What happene… — Weathering and erosion · tree and pragmatics
description: A muddy river reaches a calm lake and the water clears. What happened to the mud? Test 5 of lesson 52 «Weathering and erosion» of the geography 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 · Weathering and erosion

<!-- .ven lang=en -->
A muddy river reaches a calm lake and the water clears. What happened to the mud?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** muddy river, water · **What happens:** reach, clear, happen · **To what, where:** calm lake

<!-- .vabout -->
This is test 5 of lesson 52 «Weathering and erosion» of the geography 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/geography/52-weathering-and-erosion/#t5).

## The question {#question}

<!-- .note -->
*Sentence 1:* A muddy river reaches a calm lake and the water clears.

```conllu
# sent_id = question:geography:52-weathering-and-erosion:t5:1
# text = A muddy river reaches a calm lake and the water clears.
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	muddy	muddy	ADJ	JJ	Degree=Pos	3	amod	_	_
3	river	river	NOUN	NN	Number=Sing	4	nsubj	_	_
4	reaches	reach	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	calm	calm	ADJ	JJ	Degree=Pos	7	amod	_	_
7	lake	lake	NOUN	NN	Number=Sing	4	obj	_	_
8	and	and	CCONJ	CC	_	11	cc	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	water	water	NOUN	NN	Number=Sing	11	nsubj	_	_
11	clears	clear	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	conj	_	SpaceAfter=No
12	.	.	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **reach** | present | a muddy river | a calm lake |  |  |  |  | vn body\_motion-49.2-1-1 «NP V NP ADV»: agent=Agent lake=Theme |
| 2 | **clear** | present | the water |  |  |  |  |  | vn clear-10.3-1 «NP.Source V»: agent=Source |

<!-- .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 happened to the mud?

```conllu
# sent_id = question:geography:52-weathering-and-erosion:t5:2
# text = What happened to the mud?
1	What	what	PRON	WP	PronType=Int	2	nsubj	_	_
2	happened	happen	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
3	to	to	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	mud	mud	NOUN	NN	Number=Sing	2	obl	_	SpaceAfter=No
6	?	?	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | past |  |  |  |  |  | to the mud | vn occur-48.3-1 «NP V»: agent=Theme |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
The mud floated up into the clouds as steam

```conllu
# sent_id = question:geography:52-weathering-and-erosion:t5:o1:1
# text = The mud floated up into the clouds as steam
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	mud	mud	NOUN	NN	Number=Sing	0	root	_	_
3	floated	float	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	acl	_	_
4	up	up	ADP	RP	_	3	compound:prt	_	_
5	into	into	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	clouds	cloud	NOUN	NNS	Number=Plur	3	obl	_	_
8	as	as	ADP	IN	_	9	case	_	_
9	steam	steam	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **float up** | participle |  | the mud *not said here* |  | the clouds |  | as steam | vn run-51.3.2-2 «NP V PP.location»: agent=Theme into cloud=Destination |

### Option 2 {#o2}

<!-- .ven lang=en -->
The mud dissolved into nothing

```conllu
# sent_id = question:geography:52-weathering-and-erosion:t5:o2:1
# text = The mud dissolved into nothing
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	mud	mud	NOUN	NN	Number=Sing	0	root	_	_
3	dissolved	dissolve	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	acl	_	_
4	into	into	ADP	IN	_	5	case	_	_
5	nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** | participle |  | the mud *not said here* |  |  |  | into nothing *result* | vn break-45.1 «NP V PP.result»: agent=Patient into nothing=Result |

### Option 3 {#o3}

<!-- .ven lang=en -->
The mud turned into fish food at once and was all eaten up

```conllu
# sent_id = question:geography:52-weathering-and-erosion:t5:o3:1
# text = The mud turned into fish food at once and was all eaten up
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	mud	mud	NOUN	NN	Number=Sing	3	nsubj	_	_
3	turned	turn	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
4	into	into	ADP	IN	_	6	case	_	_
5	fish	fish	NOUN	NN	Number=Sing	6	compound	_	_
6	food	food	NOUN	NN	Number=Sing	3	obl	_	_
7	at	at	ADP	IN	_	8	case	_	_
8	once	once	ADV	RB	NumForm=Word|NumType=Mult	3	obl	_	_
9	and	and	CCONJ	CC	_	12	cc	_	_
10	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	12	aux:pass	_	_
11	all	all	ADV	RB	_	12	advmod	_	_
12	eaten	eat	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	conj	_	_
13	up	up	ADP	RP	_	12	compound:prt	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | past | the mud |  |  | fish food |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme into food=Trajectory |
| 2 | **eat up** | past · passive | the mud *not said here* |  |  |  |  | all *property* | vn eat-39.1-1 «NP V» |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The water slowed and dropped it, which is deposition

```conllu
# sent_id = question:geography:52-weathering-and-erosion:t5:o4:1
# text = The water slowed and dropped it, which is deposition
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	water	water	NOUN	NN	Number=Sing	3	nsubj	_	_
3	slowed	slow	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	_	_
4	and	and	CCONJ	CC	_	5	cc	_	_
5	dropped	drop	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	conj	_	_
6	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	obj	_	SpaceAfter=No
7	,	,	PUNCT	,	_	10	punct	_	_
8	which	which	PRON	WDT	PronType=Rel	10	nsubj	_	_
9	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	cop	_	_
10	deposition	deposition	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **slow** | past | the water |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 2 | **drop** | past | the water *not said here* | water |  |  |  |  | vn put\_direction-9.4 «NP V NP»: agent=Agent it=Theme |
| 3 | **is a** | present |  | deposition |  |  |  |  | tree rules |

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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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