---
title: Why is a metal ladder dangerous near power lines but a dry wooden on… — Electricity — circuits, switches and s… · tree and pragmatics
description: Why is a metal ladder dangerous near power lines but a dry wooden one less so? Test 7 · ★★ of lesson 55 «Electricity — circuits, switches and safety» of the world 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 7 · ★★ · Electricity — circuits, switches and safety

<!-- .ven lang=en -->
Why is a metal ladder dangerous near power lines but a dry wooden one less so?

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

<!-- .vabout -->
This is test 7 · ★★ of lesson 55 «Electricity — circuits, switches and safety» of the world 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/world/55-electricity/#t7).

## The question {#question}

```conllu
# sent_id = question:world:55-electricity:t7:1
# text = Why is a metal ladder dangerous near power lines but a dry wooden one less so?
1	Why	why	ADV	WRB	PronType=Int	6	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	metal	metal	NOUN	NN	Number=Sing	5	compound	_	_
5	ladder	ladder	NOUN	NN	Number=Sing	6	nsubj	_	_
6	dangerous	dangerous	ADJ	JJ	Degree=Pos	0	root	_	_
7	near	near	ADP	IN	_	9	case	_	_
8	power	power	NOUN	NN	Number=Sing	9	compound	_	_
9	lines	line	NOUN	NNS	Number=Plur	6	obl	_	_
10	but	but	CCONJ	CC	_	14	cc	_	_
11	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	_	_
12	dry	dry	ADJ	JJ	Degree=Pos	14	amod	_	_
13	wooden	wooden	ADJ	JJ	Degree=Pos	14	amod	_	_
14	one	one	NOUN	NN	Number=Sing	9	acl	_	_
15	less	less	ADV	RBR	Degree=Cmp	16	advmod	_	_
16	so	so	ADV	RB	_	14	advmod	_	SpaceAfter=No
17	?	?	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | a metal ladder |  |  | power lines |  | dangerous *property* | tree rules |

<!-- .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 -->
Metal conducts electricity and dry wood does not easily

```conllu
# sent_id = question:world:55-electricity:t7:o1:1
# text = Metal conducts electricity and dry wood does not easily
1	Metal	metal	NOUN	NN	Number=Sing	2	nsubj	_	_
2	conducts	conduct	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	electricity	electricity	NOUN	NN	Number=Sing	2	obj	_	_
4	and	and	CCONJ	CC	_	7	cc	_	_
5	dry	dry	ADJ	JJ	Degree=Pos	6	amod	_	_
6	wood	wood	NOUN	NN	Number=Sing	7	nsubj	_	_
7	does	do	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	2	conj	_	_
8	not	not	PART	RB	Polarity=Neg	7	advmod	_	_
9	easily	easily	ADV	RB	_	7	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **conduct** | present | Metal | electricity |  |  |  |  | vn accompany-51.7 «NP V NP»: agent=Agent electricity=Theme |
| 2 | **not** **do** | present | dry wood |  |  |  |  | easily *property* | vn act-114-1 «NP V»: agent=Agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
Wooden ladders store electricity

```conllu
# sent_id = question:world:55-electricity:t7:o2:1
# text = Wooden ladders store electricity
1	Wooden	wooden	ADJ	JJ	Degree=Pos	2	amod	_	_
2	ladders	ladder	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	store	store	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	electricity	electricity	NOUN	NN	Number=Sing	3	obj	_	_
```

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

### Option 3 {#o3}

<!-- .ven lang=en -->
Wood is heavier than metal

```conllu
# sent_id = question:world:55-electricity:t7:o3:1
# text = Wood is heavier than metal
1	Wood	wood	NOUN	NN	Number=Sing	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	heavier	heavy	ADJ	JJR	Degree=Cmp	0	root	_	_
4	than	than	ADP	IN	_	5	case	_	_
5	metal	metal	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Wood |  |  |  |  | than metal; heavy *property* | tree rules |

### Option 4 {#o4}

<!-- .ven lang=en -->
Metal is an insulator

```conllu
# sent_id = question:world:55-electricity:t7:o4:1
# text = Metal is an insulator
1	Metal	metal	NOUN	NN	Number=Sing	4	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	an	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	insulator	insulator	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | Metal | a insulator |  |  |  |  | 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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- ← previous: [Electricity — circuits, switches and s…, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/world/55-electricity/t6/)
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