--- title: The sky is blue because the tiny bits of the air scatter blue light… — Mirrors, rainbows and the blue sky · tree and pragmatics description: The sky is blue because the tiny bits of the air scatter blue light all over the sky much more than red; at sunset the light crosses so much air that most of the blue is scattered away, leaving orange and red. Who acts: sky, tiny bits, light. A sentence of the lesson «Mirrors, rainbows and the blue --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/physics/21-mirrors-rainbows-and-the-blue-sky/3/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Physics](https://md.mova.elamur.ai/free/en/corpora/school/physics/) / [Mirrors, rainbows and the blue sky](https://md.mova.elamur.ai/free/en/corpora/school/physics/21-mirrors-rainbows-and-the-blue-sky/) / 3 # Mirrors, rainbows and the blue sky, sentence 3 The sky is blue because the tiny bits of the air scatter blue light all over the sky much more than red; at sunset the light crosses so much air that most of the blue is scattered away, leaving orange and red. **Who acts:** sky, tiny bits, light · **What happens:** be, scatter, cross, scatter away, leave · **To what, where:** blue light, sky, much air, most, orange This is a sentence of the lesson «Mirrors, rainbows and the blue sky» of the physics course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (sky, tiny bits, light), what happens, when and where, as Mova's frames read it from the tree. ## The tree {#tree} ```conllu # sent_id = school:physics:021-mirrors-rainbows-and-the-blue-sky.lesson:3 # text = The sky is blue because the tiny bits of the air scatter blue light all over the sky much more than red; at sunset the light crosses so much air that most of the blue is scattered away, leaving orange and red. # source = school lesson (ours) # course = physics # lesson = 021-mirrors-rainbows-and-the-blue-sky.lesson # annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R2-punct-next ×1, R5-strong ×2, R7-rel-agree ×3 1 The the DET DT Definite=Def|PronType=Art 2 det _ _ 2 sky sky NOUN NN Number=Sing 4 nsubj _ _ 3 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 4 cop _ _ 4 blue blue ADJ JJ Degree=Pos 0 root _ _ 5 because because SCONJ IN _ 12 mark _ _ 6 the the DET DT Definite=Def|PronType=Art 8 det _ _ 7 tiny tiny ADJ JJ Degree=Pos 8 amod _ _ 8 bits bit NOUN NNS Number=Plur 12 nsubj _ _ 9 of of ADP IN _ 11 case _ _ 10 the the DET DT Definite=Def|PronType=Art 11 det _ _ 11 air air NOUN NN Number=Sing 8 nmod _ _ 12 scatter scatter VERB VBP Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin 4 advcl _ _ 13 blue blue ADJ JJ Degree=Pos 14 amod _ Agree=R7-rel-agree|Haiku=14:compound|HaikuPos=NOUN:NN:Number=Sing 14 light light NOUN NN Number=Sing 12 obj _ _ 15 all all ADV RB _ 18 advmod _ _ 16 over over ADP IN _ 18 case _ _ 17 the the DET DT Definite=Def|PronType=Art 18 det _ _ 18 sky sky NOUN NN Number=Sing 12 obl _ _ 19 much much ADV RB _ 20 advmod _ _ 20 more more ADV RBR Degree=Cmp 12 advmod _ _ 21 than than ADP IN _ 22 case _ _ 22 red red ADJ JJ Degree=Pos 20 obl _ Agree=R5-strong|Haiku=12:obl 23 ; ; PUNCT , _ 28 punct _ Agree=R2-punct-next|Haiku=4:punct 24 at at ADP IN _ 25 case _ _ 25 sunset sunset NOUN NN Number=Sing 28 obl _ _ 26 the the DET DT Definite=Def|PronType=Art 27 det _ _ 27 light light NOUN NN Number=Sing 28 nsubj _ _ 28 crosses cross VERB VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 4 parataxis _ Agree=R7-rel-agree|Haiku=4:conj 29 so so ADV RB _ 30 advmod _ _ 30 much much ADJ JJ Degree=Pos 31 amod _ _ 31 air air NOUN NN Number=Sing 28 obj _ _ 32 that that SCONJ IN _ 38 mark _ _ 33 most most ADJ JJS Degree=Sup 38 nsubj _ _ 34 of of ADP IN _ 36 case _ _ 35 the the DET DT Definite=Def|PronType=Art 36 det _ _ 36 blue blue NOUN NN Number=Sing 33 nmod _ _ 37 is be AUX VBZ Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin 38 aux:pass _ _ 38 scattered scatter VERB VBN Tense=Past|VerbForm=Part|Voice=Pass 28 advcl _ _ 39 away away ADV RB _ 38 advmod _ _ 40 , , PUNCT , _ 41 punct _ _ 41 leaving leave VERB VBG Tense=Pres|VerbForm=Part 38 advcl _ Agree=R5-strong|Haiku=28:advcl 42 orange orange ADJ JJ Degree=Pos 41 obj _ Agree=R7-rel-agree|Haiku=41:xcomp 43 and and CCONJ CC _ 44 cc _ _ 44 red red ADJ JJ Degree=Pos 42 conj _ _ 45 . . PUNCT . _ 4 punct _ _ ``` ## Pragmatics {#pragmatics} No stored speech act for this sentence. | # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 1 | **is** | present | the sky | | | | | blue *property* | tree rules | | 2 | **scatter** | present | the tiny bits of the air | blue light | | the sky | | | vn spray-9.7-1 «NP V NP PP.destination»: agent=Agent light=Theme over sky=Destination | | 3 | **cross** | present | the light | much air | | | sunset | | vn crane-40.3.2 «NP V NP»: agent=Agent air=Patient | | 4 | **scatter away** | present · passive | | most of the blue | | | | away *property* | vn spray-9.7-1 «NP V NP.theme»: subject=Theme | | 5 | **leave** | gerund | | orange | | | | | vn keep-15.2 «NP V NP»: agent=Agent orange=Theme | 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. **Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:physics:021-mirrors-rainbows-and-the-blue-sky.lesson:3`. **The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R2-punct-next ×1, R5-strong ×2, R7-rel-agree ×3. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence. See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/). - ← previous: [Mirrors, rainbows and the blue sky, 2](https://md.mova.elamur.ai/free/en/corpora/school/physics/21-mirrors-rainbows-and-the-blue-sky/2/) - next →: [Mirrors, rainbows and the blue sky, 4](https://md.mova.elamur.ai/free/en/corpora/school/physics/21-mirrors-rainbows-and-the-blue-sky/4/) - ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/physics/21-mirrors-rainbows-and-the-blue-sky/)