---
title: Why do astronauts not need gravity to swallow their food? — Digestion: the journey of a sandwich · tree and pragmatics
description: Why do astronauts not need gravity to swallow their food? Test 10 · ★★ of lesson 67 «Digestion: the journey of a sandwich» 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 right.
---

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# Test 10 · ★★ · Digestion: the journey of a sandwich

<!-- .ven lang=en -->
Why do astronauts not need gravity to swallow their food?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** astronauts, gravity · **What happens:** not need, swallow · **To what, where:** gravity, food

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This is test 10 · ★★ of lesson 67 «Digestion: the journey of a sandwich» 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/67-digestion-the-journey-of-a-sandwich/#t10).

## The question {#question}

```conllu
# sent_id = question:biology:67-digestion-the-journey-of-a-sandwich:t10:1
# text = Why do astronauts not need gravity to swallow their food?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	aux	_	_
3	astronauts	astronaut	NOUN	NNS	Number=Plur	5	nsubj	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	need	need	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
6	gravity	gravity	NOUN	NN	Number=Sing	5	obj	_	_
7	to	to	PART	TO	_	8	mark	_	_
8	swallow	swallow	VERB	VB	VerbForm=Inf	5	xcomp	_	_
9	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	10	nmod:poss	_	_
10	food	food	NOUN	NN	Number=Sing	8	obj	_	SpaceAfter=No
11	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **need** | present · do-support | astronauts | gravity |  |  |  |  | tree rules |
| 2 | **swallow** *not said to happen* | to-infinitive | gravity *not said here* | astronauts's food |  |  |  |  | vn gobble-39.3 «NP V NP»: agent=Agent food=Patient |

<!-- .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 {#o1}

<!-- .ven lang=en -->
Space food floats into the stomach by itself

```conllu
# sent_id = question:biology:67-digestion-the-journey-of-a-sandwich:t10:o1:1
# text = Space food floats into the stomach by itself
1	Space	space	NOUN	NN	Number=Sing	2	compound	_	_
2	food	food	NOUN	NN	Number=Sing	3	nsubj	_	_
3	floats	float	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	into	into	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	stomach	stomach	NOUN	NN	Number=Sing	3	obl	_	_
7	by	by	ADP	IN	_	8	case	_	_
8	itself	itself	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs|Reflex=Yes	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **float** | present | Space food |  |  | the stomach |  | by food | vn roll-51.3.1 «NP.theme V PP.source PP.trajectory PP.destination»: agent=Theme into stomach=Source by itself=Trajectory |

### Option 2 {#o2}

<!-- .ven lang=en -->
They always eat upside down so it all evens out

```conllu
# sent_id = question:biology:67-digestion-the-journey-of-a-sandwich:t10:o2:1
# text = They always eat upside down so it all evens out
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
2	always	always	ADV	RB	PronType=Tot	3	advmod	_	_
3	eat	eat	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	upside	upside	NOUN	NN	Number=Sing	3	obj	_	_
5	down	down	ADV	RB	_	3	advmod	_	_
6	so	so	ADV	RB	_	9	advmod	_	_
7	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nsubj	_	_
8	all	all	DET	DT	PronType=Tot	7	det	_	_
9	evens	even	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	advcl	_	_
10	out	out	ADP	RP	_	9	compound:prt	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **eat down** | present | They | upside |  |  |  | always, down *property* | vn eat-39.1-1 «NP V NP»: agent=Agent upside=Patient |
| 2 | **even out** | present | upside |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
They drink all their food through tubes into the stomach

```conllu
# sent_id = question:biology:67-digestion-the-journey-of-a-sandwich:t10:o3:1
# text = They drink all their food through tubes into the stomach
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	drink	drink	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	all	all	DET	PDT	PronType=Tot	5	det:predet	_	_
4	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
5	food	food	NOUN	NN	Number=Sing	2	obj	_	_
6	through	through	ADP	IN	_	7	case	_	_
7	tubes	tube	NOUN	NNS	Number=Plur	2	obl	_	_
8	into	into	ADP	IN	_	10	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	stomach	stomach	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **drink** | present | They | their food |  | tubes |  | into the stomach | vn eat-39.1-1 «NP V NP»: agent=Agent food=Patient |

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

<!-- .ven lang=en -->
Muscles in the food pipe push the food along by squeezing

```conllu
# sent_id = question:biology:67-digestion-the-journey-of-a-sandwich:t10:o4:1
# text = Muscles in the food pipe push the food along by squeezing
1	Muscles	muscle	NOUN	NNS	Number=Plur	6	nsubj	_	_
2	in	in	ADP	IN	_	5	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	food	food	NOUN	NN	Number=Sing	5	compound	_	_
5	pipe	pipe	NOUN	NN	Number=Sing	1	nmod	_	_
6	push	push	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	food	food	NOUN	NN	Number=Sing	6	obj	_	_
9	along	along	ADV	RB	_	6	advmod	_	_
10	by	by	SCONJ	IN	_	11	mark	_	_
11	squeezing	squeeze	VERB	VBG	Tense=Pres|VerbForm=Part	6	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **push** | present | Muscles in the food pipe | the food |  |  |  | along *property* | vn carry-11.4-1-1 «NP V NP»: agent=Agent food=Theme |
| 2 | **squeeze** | gerund | Muscles in the food pipe *not said here* |  |  |  |  |  | vn push-12-1-1 «NP V PP»: 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.

<!-- /div -->

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