--- title: Why might a racing pigeon get confused over a big lump of magnetic i… — Compasses and the magnetic Earth · tree and pragmatics description: Why might a racing pigeon get confused over a big lump of magnetic iron ore? Test 7 · ★ of lesson 30 «Compasses and the magnetic Earth» 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 right. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/physics/30-compasses-and-the-magnetic-earth/t7/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/questions/physics/) / [Compasses and the magnetic Earth](https://md.mova.elamur.ai/free/en/corpora/questions/physics/30-compasses-and-the-magnetic-earth/) / t7 # Test 7 · ★ · Compasses and the magnetic Earth Why might a racing pigeon get confused over a big lump of magnetic iron ore? **Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** racing pigeon · **What happens:** get This is test 7 · ★ of lesson 30 «Compasses and the magnetic Earth» 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/30-compasses-and-the-magnetic-earth/#t7). ## The question {#question} ```conllu # sent_id = question:physics:30-compasses-and-the-magnetic-earth:t7:1 # text = Why might a racing pigeon get confused over a big lump of magnetic iron ore? 1 Why why ADV WRB PronType=Int 6 advmod _ _ 2 might might AUX MD VerbForm=Fin 6 aux _ _ 3 a a DET DT Definite=Ind|PronType=Art 5 det _ _ 4 racing racing NOUN NN Number=Sing 5 compound _ _ 5 pigeon pigeon NOUN NN Number=Sing 6 nsubj _ _ 6 get get VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 7 confused confused ADJ JJ Degree=Pos 6 xcomp _ _ 8 over over ADP IN _ 11 case _ _ 9 a a DET DT Definite=Ind|PronType=Art 11 det _ _ 10 big big ADJ JJ Degree=Pos 11 amod _ _ 11 lump lump NOUN NN Number=Sing 7 obl _ _ 12 of of ADP IN _ 15 case _ _ 13 magnetic magnetic ADJ JJ Degree=Pos 15 amod _ _ 14 iron iron NOUN NN Number=Sing 15 compound _ _ 15 ore ore NOUN NN Number=Sing 11 nmod _ SpaceAfter=No 16 ? ? PUNCT . _ 6 punct _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **get** | might | a racing pigeon | | | | | confused *property* | vn comprehend-87.2-1 «NP V S\_ING»: agent=Experiencer | 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} It uses the Earth's magnetic field to steer, and that can be disturbed ```conllu # sent_id = question:physics:30-compasses-and-the-magnetic-earth:t7:o1:1 # text = It uses the Earth's magnetic field to steer, and that can be disturbed 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 2 nsubj _ _ 2 uses use 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 Earth Earth PROPN NNP Number=Sing 7 nmod:poss _ SpaceAfter=No 5 's 's PART POS _ 4 case _ _ 6 magnetic magnetic ADJ JJ Degree=Pos 7 amod _ _ 7 field field NOUN NN Number=Sing 2 obj _ _ 8 to to PART TO _ 9 mark _ _ 9 steer steer VERB VB VerbForm=Inf 7 acl _ SpaceAfter=No 10 , , PUNCT , _ 15 punct _ _ 11 and and CCONJ CC _ 15 cc _ _ 12 that that PRON DT Number=Sing|PronType=Dem 15 nsubj:pass _ _ 13 can can AUX MD VerbForm=Fin 15 aux _ _ 14 be be AUX VB VerbForm=Inf 15 aux:pass _ _ 15 disturbed disturb VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 2 parataxis _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **use** | present | It | the Earth's magnetic field | | | | | vn eat-39.1 «NP V NP»: agent=Agent field=Patient | | 2 | **steer** | to-infinitive | | the Earth's magnetic field *not said here* | | | | | vn accompany-51.7 «NP V NP»: agent=Agent | | 3 | **disturb** | can · passive | | that | | | | | vn amuse-31.1 «NP V NP»: subject=Experiencer | ### Option 2 {#o2} Pigeons are scared of rocks ```conllu # sent_id = question:physics:30-compasses-and-the-magnetic-earth:t7:o2:1 # text = Pigeons are scared of rocks 1 Pigeons pigeon NOUN NNS Number=Plur 3 nsubj _ _ 2 are be AUX VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 3 cop _ _ 3 scared scared ADJ JJ Degree=Pos 0 root _ _ 4 of of ADP IN _ 5 case _ _ 5 rocks rock NOUN NNS Number=Plur 3 obl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is** | present | Pigeons | | | | | of rocks; scared *property* | tree rules | ### Option 3 {#o3} The rocks block the smell of home ```conllu # sent_id = question:physics:30-compasses-and-the-magnetic-earth:t7:o3:1 # text = The rocks block the smell of home 1 The the DET DT Definite=Def|PronType=Art 2 det _ _ 2 rocks rock NOUN NNS Number=Plur 3 nsubj _ _ 3 block block VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 4 the the DET DT Definite=Def|PronType=Art 5 det _ _ 5 smell smell NOUN NN Number=Sing 3 obj _ _ 6 of of ADP IN _ 7 case _ _ 7 home home NOUN NN Number=Sing 5 nmod _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **block** | present | the rocks | the smell of home | | | | | vn forbid-64.4-1 «NP V NP»: agent=Causer smell=Theme | | 2 | **smell** | | home | | | | | | nom smell «cognition intransitive»: of=agent | ### Option 4 {#o4} Pigeons only follow motorways ```conllu # sent_id = question:physics:30-compasses-and-the-magnetic-earth:t7:o4:1 # text = Pigeons only follow motorways 1 Pigeons pigeon NOUN NNS Number=Plur 3 nsubj _ _ 2 only only ADV RB _ 3 advmod _ _ 3 follow follow VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 4 motorways motorway NOUN NNS Number=Plur 3 obj _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **follow** | present | Pigeons | motorways | | | | | vn chase-51.6 «NP V NP»: agent=Agent motorway=Theme | **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. - ← previous: [Compasses and the magnetic Earth, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/physics/30-compasses-and-the-magnetic-earth/t6/) - next →: [Compasses and the magnetic Earth, test 8](https://md.mova.elamur.ai/free/en/corpora/questions/physics/30-compasses-and-the-magnetic-earth/t8/) - ↑ back to [Compasses and the magnetic Earth](https://md.mova.elamur.ai/free/en/corpora/questions/physics/30-compasses-and-the-magnetic-earth/)