---
title: Why would a Bronze Age smith add tin to copper? — Metals and what they're good for · tree and pragmatics
description: Why would a Bronze Age smith add tin to copper? Test 7 of lesson 31 «Metals and what they're good for» 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 wrong.
---

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# Test 7 · Metals and what they're good for

<!-- .ven lang=en -->
Why would a Bronze Age smith add tin to copper?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **Who acts:** Bronze Age smith · **What happens:** add · **To what, where:** tin

<!-- .vabout -->
This is test 7 of lesson 31 «Metals and what they're good for» 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/31-metals-what-theyre-good-for/#t7).

## The question {#question}

```conllu
# sent_id = question:chemistry:31-metals-what-theyre-good-for:t7:1
# text = Why would a Bronze Age smith add tin to copper?
1	Why	why	ADV	WRB	PronType=Int	7	advmod	_	_
2	would	would	AUX	MD	VerbForm=Fin	7	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
4	Bronze	Bronze	PROPN	NNP	Number=Sing	6	compound	_	_
5	Age	age	NOUN	NN	Number=Sing	6	compound	_	_
6	smith	smith	NOUN	NN	Number=Sing	7	nsubj	_	_
7	add	add	VERB	VB	VerbForm=Inf	0	root	_	_
8	tin	tin	NOUN	NN	Number=Sing	7	obj	_	_
9	to	to	PART	TO	_	10	mark	_	_
10	copper	copper	NOUN	NN	Number=Sing	7	advcl	_	SpaceAfter=No
11	?	?	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **add** *speech: assert* | would | a Bronze Age smith | tin |  |  |  |  | vn mix-22.1-2 «NP V NP»: agent=Agent tin=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 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
To make the copper float

```conllu
# sent_id = question:chemistry:31-metals-what-theyre-good-for:t7:o1:1
# text = To make the copper float
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	copper	copper	NOUN	NN	Number=Sing	5	compound	_	_
5	float	float	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | the copper float |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset float=Product |

### Option 2 {#o2}

<!-- .ven lang=en -->
To make the copper magnetic

```conllu
# sent_id = question:chemistry:31-metals-what-theyre-good-for:t7:o2:1
# text = To make the copper magnetic
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	copper	copper	NOUN	NN	Number=Sing	2	obj	_	_
5	magnetic	magnetic	ADJ	JJ	Degree=Pos	2	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | the copper |  |  |  | magnetic *property* | vn build-26.1-1 «NP.asset V NP»: agent=Asset copper=Product |

### Option 3 {#o3}

<!-- .ven lang=en -->
To make the copper rust less

```conllu
# sent_id = question:chemistry:31-metals-what-theyre-good-for:t7:o3:1
# text = To make the copper rust less
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	VerbForm=Inf	5	advcl	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	copper	copper	NOUN	NN	Number=Sing	2	obj	_	_
5	rust	rust	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
6	less	less	ADV	RBR	Degree=Cmp	5	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | the copper |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset copper=Product |
| 2 | **rust** | present |  |  |  |  |  | less *property* | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |

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

<!-- .ven lang=en -->
To make a harder metal, bronze

```conllu
# sent_id = question:chemistry:31-metals-what-theyre-good-for:t7:o4:1
# text = To make a harder metal, bronze
1	To	to	PART	TO	_	2	mark	_	_
2	make	make	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	harder	hard	ADJ	JJR	Degree=Cmp	5	amod	_	_
5	metal	metal	NOUN	NN	Number=Sing	2	obj	_	SpaceAfter=No
6	,	,	PUNCT	,	_	7	punct	_	_
7	bronze	bronze	NOUN	NN	Number=Sing	5	appos	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | to-infinitive |  | a harder metal |  |  |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset metal=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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- ← previous: [Metals and what they're good for, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/31-metals-what-theyre-good-for/t6/)
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