---
title: In an experiment a weak radio noise is switched on near robins. What… — Hidden senses: magnetic birds and turt… · tree and pragmatics
description: In an experiment a weak radio noise is switched on near robins. What happens? Test 2 · ★ of lesson 232 «Hidden senses: magnetic birds and turtles, ultraviolet bees, heat-seeing snakes, whiskers and lateral lines» of the biology course of Mova's primary school, with the dependency tree and pragmatics
---

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# Test 2 · ★ · Hidden senses: magnetic birds and turtles, ultraviolet bee…

<!-- .ven lang=en -->
In an experiment a weak radio noise is switched on near robins. What happens?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 2 · wrong ✗ · **What happens:** switch on, happen · **To what, where:** weak radio noise, experiment

<!-- .vabout -->
This is test 2 · ★ of lesson 232 «Hidden senses: magnetic birds and turtles, ultraviolet bees, heat-seeing snakes, whiskers and lateral lines» 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/232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes/#t2).

## The question {#question}

<!-- .note -->
*Sentence 1:* In an experiment a weak radio noise is switched on near robins.

```conllu
# sent_id = question:biology:232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes:t2:1
# text = In an experiment a weak radio noise is switched on near robins.
1	In	in	ADP	IN	_	3	case	_	_
2	an	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
3	experiment	experiment	NOUN	NN	Number=Sing	9	obl	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
5	weak	weak	ADJ	JJ	Degree=Pos	7	amod	_	_
6	radio	radio	NOUN	NN	Number=Sing	7	compound	_	_
7	noise	noise	NOUN	NN	Number=Sing	9	nsubj	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	aux:pass	_	_
9	switched	switch	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
10	on	on	ADP	RP	_	9	compound:prt	_	_
11	near	near	ADP	IN	_	12	case	_	_
12	robins	robin	NOUN	NNS	Number=Plur	9	obl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	9	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **switch on** | present · passive |  | a weak radio noise |  | a experiment |  | near robins | vn convert-26.6.2-1-1 «NP V NP»: subject=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.

<!-- .note -->
*Sentence 2:* What happens?

```conllu
# sent_id = question:biology:232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes:t2:2
# text = What happens?
1	What	what	PRON	WP	PronType=Int	2	nsubj	_	_
2	happens	happen	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	SpaceAfter=No
3	?	?	PUNCT	.	_	2	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | present |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
Nothing, birds cannot sense anything like that

```conllu
# sent_id = question:biology:232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes:t2:o1:1
# text = Nothing, birds cannot sense anything like that
1	Nothing	nothing	PRON	NN	Number=Sing|PronType=Neg	3	compound	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	birds	bird	NOUN	NNS	Number=Plur	6	nsubj	_	_
4	can	can	AUX	MD	VerbForm=Fin	6	aux	_	SpaceAfter=No
5	not	not	PART	RB	Polarity=Neg	6	advmod	_	_
6	sense	sense	VERB	VB	VerbForm=Inf	0	root	_	_
7	anything	anything	PRON	NN	Number=Sing|PronType=Ind	6	obj	_	_
8	like	like	ADP	IN	_	9	case	_	_
9	that	that	PRON	DT	Number=Sing|PronType=Dem	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **sense** | can | Nothing birds | anything |  |  |  | like that | vn see-30.1-1 «NP V S»: agent=Experiencer anything=Stimulus |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
They lose their compass direction

```conllu
# sent_id = question:biology:232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes:t2:o2:1
# text = They lose their compass direction
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	lose	lose	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
4	compass	compass	NOUN	NN	Number=Sing	5	compound	_	_
5	direction	direction	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **lose** | present | They | their compass direction |  |  |  |  | vn succeed-74-3-1 «NP V NP»: agent=Agent direction=Eventuality |

### Option 3 {#o3}

<!-- .ven lang=en -->
They fly straight to Africa at once

```conllu
# sent_id = question:biology:232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes:t2:o3:1
# text = They fly straight to Africa at once
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	fly	fly	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	straight	straight	ADV	RB	_	2	advmod	_	_
4	to	to	ADP	IN	_	5	case	_	_
5	Africa	Africa	PROPN	NNP	Number=Sing	2	obl	_	_
6	at	at	ADP	IN	_	7	case	_	_
7	once	once	ADV	RB	NumForm=Word|NumType=Mult	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fly** | present | They |  | Africa |  |  | straight *property* | vn spatial\_configuration-47.6-1 «NP V PP.location»: agent=Theme at once=Location |

### Option 4 · ← Mova's choice {#o4}

<!-- .ven lang=en -->
They sing much louder than they usually do

```conllu
# sent_id = question:biology:232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes:t2:o4:1
# text = They sing much louder than they usually do
1	They	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	2	nsubj	_	_
2	sing	sing	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	much	much	ADV	RB	_	4	advmod	_	_
4	louder	loud	ADJ	JJR	Degree=Cmp	2	ccomp	_	_
5	than	than	SCONJ	IN	_	8	mark	_	_
6	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	8	nsubj	_	_
7	usually	usually	ADV	RB	_	8	advmod	_	_
8	do	do	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **sing** *speech: express* | present | They |  |  |  |  |  | vn sound\_emission-43.2 «NP V»: agent=Theme |
| 2 | **do** | present | they |  |  |  |  | usually *property* | vn act-114-1 «NP V»: 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.

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- ← previous: [Hidden senses: magnetic birds and turt…, test 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes/t1/)
- next →: [Hidden senses: magnetic birds and turt…, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes/t3/)
- ↑ back to [Hidden senses: magnetic birds and turtles, ultraviolet bees, heat-seeing snakes, whiskers and lateral lines](https://md.mova.elamur.ai/free/en/corpora/questions/biology/232-hidden-senses-magnetic-birds-ultraviolet-bees-heat-seeing-snakes/)

