--- title: Why is pond ice dangerous even when it looks thick? — The park pond through the year: ducks,… · tree and pragmatics description: Why is pond ice dangerous even when it looks thick? Test 5 of lesson 337 «The park pond through the year: ducks, coots, swans, dragonflies and ice» of the biology 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/biology/337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice/t5/) [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/) / [Biology](https://md.mova.elamur.ai/free/en/corpora/questions/biology/) / [The park pond through the year: ducks,…](https://md.mova.elamur.ai/free/en/corpora/questions/biology/337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice/) / t5 # Test 5 · The park pond through the year: ducks, coots, swans, drago… Why is pond ice dangerous even when it looks thick? **Mova's choice:** option 3 · **The right answer:** option 3 · right ✓ · **Who acts:** pond ice, it · **What happens:** be, look This is test 5 of lesson 337 «The park pond through the year: ducks, coots, swans, dragonflies and ice» 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/337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice/#t5). ## The question {#question} ```conllu # sent_id = question:biology:337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice:t5:1 # text = Why is pond ice dangerous even when it looks thick? 1 Why why ADV WRB PronType=Int 5 advmod _ _ 2 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 5 cop _ _ 3 pond pond NOUN NN Number=Sing 4 compound _ _ 4 ice ice NOUN NN Number=Sing 5 nsubj _ _ 5 dangerous dangerous ADJ JJ Degree=Pos 9 advcl _ _ 6 even even ADV RB _ 9 advmod _ _ 7 when when SCONJ WRB _ 9 mark _ _ 8 it it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 9 nsubj _ _ 9 looks look VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 10 thick thick ADJ JJ Degree=Pos 9 xcomp _ SpaceAfter=No 11 ? ? PUNCT . _ 9 punct _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is** | present | pond ice | | | | | dangerous *property* | tree rules | | 2 | **look** | present | it | | | | | thick *property* | vn stimulus\_subject-30.4 «NP V ADJ»: agent=Stimulus | 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} Thick ice is always too slippery ```conllu # sent_id = question:biology:337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice:t5:o1:1 # text = Thick ice is always too slippery 1 Thick thick ADJ JJ Degree=Pos 2 amod _ _ 2 ice ice NOUN NN Number=Sing 6 nsubj _ _ 3 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 6 cop _ _ 4 always always ADV RB PronType=Tot 6 advmod _ _ 5 too too ADV RB _ 6 advmod _ _ 6 slippery slippery ADJ JJ Degree=Pos 0 root _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is** | present | Thick ice | | | | | always, slippery *property* | tree rules | ### Option 2 {#o2} Ice melts the moment you step on it ```conllu # sent_id = question:biology:337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice:t5:o2:1 # text = Ice melts the moment you step on it 1 Ice ice NOUN NN Number=Sing 2 nsubj _ _ 2 melts melt 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 moment moment NOUN NN Number=Sing 2 obj _ _ 5 you you PRON PRP Case=Nom|Person=2|PronType=Prs 6 nsubj _ _ 6 step step VERB VBP Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin 4 acl:relcl _ _ 7 on on ADP IN _ 8 case _ _ 8 it it PRON PRP Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs 6 obl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **melt** | present | Ice | | | | moment | | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient | | 2 | **step** | present | you | the moment *not said here* | | Ice | | | tree rules | ### Option 3 · ← Mova's choice · ✓ the right answer {#o3} It can break suddenly in places you cannot see ```conllu # sent_id = question:biology:337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice:t5:o3:1 # text = It can break suddenly in places you cannot see 1 It it PRON PRP Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs 3 nsubj _ _ 2 can can AUX MD VerbForm=Fin 3 aux _ _ 3 break break VERB VB VerbForm=Inf 0 root _ _ 4 suddenly suddenly ADV RB _ 3 advmod _ _ 5 in in ADP IN _ 6 case _ _ 6 places place NOUN NNS Number=Plur 3 obl _ _ 7 you you PRON PRP Case=Nom|Person=2|PronType=Prs 10 nsubj _ _ 8 can can AUX MD VerbForm=Fin 10 aux _ SpaceAfter=No 9 not not PART RB Polarity=Neg 10 advmod _ _ 10 see see VERB VB VerbForm=Inf 6 acl:relcl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **break** | can | It | | | places | | suddenly *property* | vn appear-48.1.1 «NP V PP.location»: agent=Theme in place=Location | | 2 | **not** **see** | can | you | places *not said here* | | | | | vn comprehend-87.2-1-1 «NP V NP»: agent=Experiencer place=Stimulus | ### Option 4 {#o4} Ducks bite people on the ice ```conllu # sent_id = question:biology:337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice:t5:o4:1 # text = Ducks bite people on the ice 1 Ducks duck NOUN NNS Number=Plur 2 nsubj _ _ 2 bite bite VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 0 root _ _ 3 people people NOUN NNS Number=Plur 2 obj _ _ 4 on on ADP IN _ 6 case _ _ 5 the the DET DT Definite=Def|PronType=Art 6 det _ _ 6 ice ice NOUN NN Number=Sing 2 obl _ _ ``` | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **bite** | present | Ducks | people | | the ice | | | vn swat-18.2 «NP V NP PP.location»: agent=Agent people=Patient on ice=Location | **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: [The park pond through the year: ducks,…, test 4](https://md.mova.elamur.ai/free/en/corpora/questions/biology/337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice/t4/) - next →: [The park pond through the year: ducks,…, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/biology/337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice/t6/) - ↑ back to [The park pond through the year: ducks, coots, swans, dragonflies and ice](https://md.mova.elamur.ai/free/en/corpora/questions/biology/337-the-park-pond-through-the-year-ducks-coots-swans-dragonflies-and-ice/)