---
title: Why is it easier to float in the sea than in a swimming pool? — Mixing and dissolving · tree and pragmatics
description: Why is it easier to float in the sea than in a swimming pool? Test 4 · ★★ of lesson 6 «Mixing and dissolving» of the chemistry 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 4 · ★★ · Mixing and dissolving

<!-- .ven lang=en -->
Why is it easier to float in the sea than in a swimming pool?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** it · **What happens:** be, float · **To what, where:** sea

<!-- .vabout -->
This is test 4 · ★★ of lesson 6 «Mixing and dissolving» of the chemistry 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/chemistry/6-mixing-and-dissolving/#t4).

## The question {#question}

```conllu
# sent_id = question:chemistry:6-mixing-and-dissolving:t4:1
# text = Why is it easier to float in the sea than in a swimming pool?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
4	easier	easy	ADJ	JJR	Degree=Cmp	0	root	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	float	float	VERB	VB	VerbForm=Inf	4	xcomp	_	_
7	in	in	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	sea	sea	NOUN	NN	Number=Sing	6	obl	_	_
10	than	than	ADP	IN	_	14	case	_	_
11	in	in	ADP	IN	_	14	case	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
13	swimming	swimming	NOUN	NN	Number=Sing	14	compound	_	_
14	pool	pool	NOUN	NN	Number=Sing	6	obl	_	SpaceAfter=No
15	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | it |  |  |  |  | easy *property* | tree rules |
| 2 | **float** | to-infinitive |  |  |  | the sea |  | than a swimming pool | vn run-51.3.2-2 «NP V PP.location»: agent=Theme in sea=Trajectory |

<!-- .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 -->
Salty water holds you up more than fresh water

```conllu
# sent_id = question:chemistry:6-mixing-and-dissolving:t4:o1:1
# text = Salty water holds you up more than fresh water
1	Salty	salty	ADJ	JJ	Degree=Pos	2	amod	_	_
2	water	water	NOUN	NN	Number=Sing	3	nsubj	_	_
3	holds	hold	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	3	obj	_	_
5	up	up	ADP	RP	_	3	compound:prt	_	_
6	more	more	ADJ	JJR	Degree=Cmp	3	advmod	_	_
7	than	than	ADP	IN	_	9	case	_	_
8	fresh	fresh	ADJ	JJ	Degree=Pos	9	amod	_	_
9	water	water	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hold up** | present | Salty water | you |  |  |  |  | vn support-15.3-1 «NP V NP»: agent=Pivot you=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Waves push you up all the time

```conllu
# sent_id = question:chemistry:6-mixing-and-dissolving:t4:o2:1
# text = Waves push you up all the time
1	Waves	wave	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	push	push	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	2	obj	_	_
4	up	up	ADP	RP	_	2	compound:prt	_	_
5	all	all	DET	PDT	PronType=Tot	7	det:predet	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	time	time	NOUN	NN	Number=Sing	2	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **push up** | present | Waves | you |  |  | time |  | vn carry-11.4-1-1 «NP V NP»: agent=Agent you=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
Pool water has no particles in it

```conllu
# sent_id = question:chemistry:6-mixing-and-dissolving:t4:o3:1
# text = Pool water has no particles in it
1	Pool	pool	NOUN	NN	Number=Sing	2	compound	_	_
2	water	water	NOUN	NN	Number=Sing	3	nsubj	_	_
3	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	no	no	DET	DT	PronType=Neg	5	det	_	_
5	particles	particle	NOUN	NNS	Number=Plur	3	obj	_	_
6	in	in	ADP	IN	_	7	case	_	_
7	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Pool water | no particles |  | it |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent particle=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Sea water is much warmer than pool water

```conllu
# sent_id = question:chemistry:6-mixing-and-dissolving:t4:o4:1
# text = Sea water is much warmer than pool water
1	Sea	sea	NOUN	NN	Number=Sing	2	compound	_	_
2	water	water	NOUN	NN	Number=Sing	5	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	much	much	ADV	RB	_	5	advmod	_	_
5	warmer	warm	ADJ	JJR	Degree=Cmp	0	root	_	_
6	than	than	ADP	IN	_	8	case	_	_
7	pool	pool	NOUN	NN	Number=Sing	8	compound	_	_
8	water	water	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Sea water |  |  |  |  | than pool water; warm *property* | 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.

<!-- /div -->

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- ← previous: [Mixing and dissolving, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/6-mixing-and-dissolving/t3/)
- next →: [Mixing and dissolving, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/6-mixing-and-dissolving/t5/)
- ↑ back to [Mixing and dissolving](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/6-mixing-and-dissolving/)