---
title: what's the point of a solar panel at night then, it's useless innit — Energy: what makes things happen · tree and pragmatics
description: what's the point of a solar panel at night then, it's useless innit Test 7 of lesson 31 «Energy: what makes things happen» of the physics 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 · Energy: what makes things happen

<!-- .ven lang=en -->
what's the point of a solar panel at night then, it's useless innit

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 4 · wrong ✗ · **Who acts:** point · **What happens:** be, point · **To what, where:** useless innit, solar panel

<!-- .vabout -->
This is test 7 of lesson 31 «Energy: what makes things happen» of the physics 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/physics/31-energy-what-makes-things-happen/#t7).

## The question {#question}

```conllu
# sent_id = question:physics:31-energy-what-makes-things-happen:t7:1
# text = what's the point of a solar panel at night then, it's useless innit
1	what	what	PRON	WP	PronType=Int	0	root	_	SpaceAfter=No
2	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	cop	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	point	point	NOUN	NN	Number=Sing	1	nsubj	_	_
5	of	of	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	solar	solar	ADJ	JJ	Degree=Pos	8	amod	_	_
8	panel	panel	NOUN	NN	Number=Sing	4	nmod	_	_
9	at	at	ADP	IN	_	10	case	_	_
10	night	night	NOUN	NN	Number=Sing	8	nmod	_	_
11	then	then	ADV	RB	PronType=Dem	1	advmod	_	SpaceAfter=No
12	,	,	PUNCT	,	_	1	punct	_	_
13	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	16	nsubj	_	SpaceAfter=No
14	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	16	cop	_	_
15	useless	useless	ADJ	JJ	Degree=Pos	16	amod	_	_
16	innit	innit	NOUN	NN	Number=Sing	1	acl:relcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the point of a solar panel at night |  |  |  | then |  | tree rules |
| 2 | **is a** | present | point | useless innit |  |  |  |  | tree rules |
| 3 | **point** |  |  | a solar panel at night |  |  |  |  | nom point «cognition transitive»: of=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 -->
Panels work the same day and night

```conllu
# sent_id = question:physics:31-energy-what-makes-things-happen:t7:o1:1
# text = Panels work the same day and night
1	Panels	panel	NOUN	NNS	Number=Plur	2	nsubj	_	_
2	work	work	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	same	same	ADJ	JJ	Degree=Pos	5	amod	_	_
5	day	day	NOUN	NN	Number=Sing	2	obl:unmarked	_	_
6	and	and	CCONJ	CC	_	7	cc	_	_
7	night	night	NOUN	NN	Number=Sing	5	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **work** | present | Panels |  |  |  | day |  | vn employment-95.3 «NP V»: agent=Agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
It stores the dark for later

```conllu
# sent_id = question:physics:31-energy-what-makes-things-happen:t7:o2:1
# text = It stores the dark for later
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	stores	store	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	dark	dark	NOUN	NN	Number=Sing	2	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	later	late	ADV	RBR	Degree=Cmp	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **store** | present | It | the dark |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent dark=Theme |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
It makes even more at night from moonlight

```conllu
# sent_id = question:physics:31-energy-what-makes-things-happen:t7:o3:1
# text = It makes even more at night from moonlight
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	even	even	ADV	RB	_	4	advmod	_	_
4	more	more	ADJ	JJR	Degree=Cmp	2	obj	_	_
5	at	at	ADP	IN	_	6	case	_	_
6	night	night	NOUN	NN	Number=Sing	2	obl	_	_
7	from	from	ADP	IN	_	8	case	_	_
8	moonlight	moonlight	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | It | more |  | moonlight | night |  | vn build-26.1-1 «NP.asset V PP»: agent=Asset more=Product from moonlight=Material |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
At night it makes no electricity, which is why homes also use mains power or batteries

<!-- fold The tree, 16 words -->
```conllu
# sent_id = question:physics:31-energy-what-makes-things-happen:t7:o4:1
# text = At night it makes no electricity, which is why homes also use mains power or batteries
1	At	at	ADP	IN	_	2	case	_	_
2	night	night	NOUN	NN	Number=Sing	4	obl	_	_
3	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
4	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	no	no	DET	DT	PronType=Neg	6	det	_	_
6	electricity	electricity	NOUN	NN	Number=Sing	4	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	why	why	ADV	WRB	PronType=Int	6	acl:relcl	_	_
11	homes	home	NOUN	NNS	Number=Plur	13	nsubj	_	_
12	also	also	ADV	RB	_	13	advmod	_	_
13	use	use	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	10	ccomp	_	_
14	mains	main	NOUN	NNS	Number=Plur	13	obj	_	_
15	power	power	NOUN	NN	Number=Sing	13	obj	_	_
16	or	or	CCONJ	CC	_	17	cc	_	_
17	batteries	battery	NOUN	NNS	Number=Plur	15	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | it | no electricity |  |  | night |  | vn build-26.1-1 «NP.material V NP»: agent=Material electricity=Product |
| 2 | **is** | present | no electricity |  |  |  |  | why *property* | tree rules |
| 3 | **use** | present | homes | mains |  |  |  |  | tree rules |

<!-- div src -->

**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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