---
title: Why does staring at a bright screen before bed make it harder to fal… — Sleep and hibernation · tree and pragmatics
description: Why does staring at a bright screen before bed make it harder to fall asleep? Test 10 · ★ of lesson 55 «Sleep and hibernation» 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 · ★ · Sleep and hibernation

<!-- .ven lang=en -->
Why does staring at a bright screen before bed make it harder to fall asleep?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 3 · right ✓ · **Who acts:** staring, bed · **What happens:** stare, make, fall · **To what, where:** bed

<!-- .vabout -->
This is test 10 · ★ of lesson 55 «Sleep and hibernation» 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/55-sleep-and-hibernation/#t10).

## The question {#question}

```conllu
# sent_id = question:biology:55-sleep-and-hibernation:t10:1
# text = Why does staring at a bright screen before bed make it harder to fall asleep?
1	Why	why	ADV	WRB	PronType=Int	3	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux	_	_
3	staring	stare	VERB	VBG	Tense=Pres|VerbForm=Part	10	csubj	_	_
4	at	at	ADP	IN	_	7	case	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	bright	bright	ADJ	JJ	Degree=Pos	7	amod	_	_
7	screen	screen	NOUN	NN	Number=Sing	3	obl	_	_
8	before	before	ADP	IN	_	9	case	_	_
9	bed	bed	NOUN	NN	Number=Sing	3	obl	_	_
10	make	make	VERB	VBP	Mood=Ind|Tense=Pres|VerbForm=Fin	0	root	_	_
11	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	10	obj	_	_
12	harder	hard	ADJ	JJR	Degree=Cmp	10	xcomp	_	_
13	to	to	PART	TO	_	14	mark	_	_
14	fall	fall	VERB	VB	VerbForm=Inf	12	xcomp	_	_
15	asleep	asleep	ADJ	JJ	Degree=Pos	14	xcomp	_	SpaceAfter=No
16	?	?	PUNCT	.	_	10	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stare** | present · do-support |  |  |  |  | before bed | at a bright screen | vn peer-30.3 «NP V PP.theme»: agent=Agent at screen=Theme |
| 2 | **make** | present | staring | bed |  |  |  | hard *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset it=Product |
| 3 | **fall** | to-infinitive | bed *not said here* |  |  |  |  | asleep *property* | vn occur-48.3 «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.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Screens use up all of the brain's memory

```conllu
# sent_id = question:biology:55-sleep-and-hibernation:t10:o1:1
# text = Screens use up all of the brain's memory
1	Screens	screen	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	use	use	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	up	up	ADP	RP	_	2	compound:prt	_	_
4	all	all	DET	DT	PronType=Tot	2	obj	_	_
5	of	of	ADP	IN	_	9	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	brain	brain	NOUN	NN	Number=Sing	9	nmod:poss	_	SpaceAfter=No
8	's	's	PART	POS	_	7	case	_	_
9	memory	memory	NOUN	NN	Number=Sing	4	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **use up** | present | Screens | all |  |  |  |  | vn eat-39.1 «NP V NP»: agent=Agent all=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It doesn't, screens help you sleep better

```conllu
# sent_id = question:biology:55-sleep-and-hibernation:t10:o2:1
# text = It doesn't, screens help you sleep better
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	does	do	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	SpaceAfter=No
3	n't	not	PART	RB	Polarity=Neg	2	advmod	_	SpaceAfter=No
4	,	,	PUNCT	,	_	6	punct	_	_
5	screens	screen	NOUN	NNS	Number=Plur	6	nsubj	_	_
6	help	help	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
7	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	6	obj	_	_
8	sleep	sleep	VERB	VB	VerbForm=Inf	6	xcomp	_	_
9	better	well	ADV	RBR	Degree=Cmp	8	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **do** | present | It |  |  |  |  |  | vn act-114-1 «NP V»: agent=Agent |
| 2 | **help** | present | screens | you |  |  |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent you=Beneficiary clause=Theme |
| 3 | **sleep** | infinitive | you *not said here* |  |  |  |  | well *property* | vn snooze-40.4-1 «NP V»: agent=Agent |

### Option 3 · ← Mova's choice · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Bright light tells the brain it is still daytime

```conllu
# sent_id = question:biology:55-sleep-and-hibernation:t10:o3:1
# text = Bright light tells the brain it is still daytime
1	Bright	bright	ADJ	JJ	Degree=Pos	2	amod	_	_
2	light	light	NOUN	NN	Number=Sing	3	nsubj	_	_
3	tells	tell	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	brain	brain	NOUN	NN	Number=Sing	3	obj	_	_
6	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	9	nsubj	_	_
7	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	_	_
8	still	still	ADV	RB	_	9	advmod	_	_
9	daytime	daytime	ADJ	JJ	Degree=Pos	3	ccomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **tell** *speech: assert* | present | Bright light | the brain |  |  |  |  | vn transfer\_mesg-37.1.1-1-1 «NP V NP.recipient»: agent=Agent brain=Recipient |
| 2 | **is** | present | light |  |  |  | still | daytime *property* | tree rules |

### Option 4 {#o4}

<!-- .ven lang=en -->
Screens make your eyes too heavy

```conllu
# sent_id = question:biology:55-sleep-and-hibernation:t10:o4:1
# text = Screens make your eyes too heavy
1	Screens	screen	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	4	nmod:poss	_	_
4	eyes	eye	NOUN	NNS	Number=Plur	2	obj	_	_
5	too	too	ADV	RB	_	6	advmod	_	_
6	heavy	heavy	ADJ	JJ	Degree=Pos	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Screens | your eyes |  |  |  | heavy *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset eye=Product |

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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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