--- title: Olympiad: kitchen chemistry puzzles ★★★ — a lesson of Mova's school · trees and pragmatics description: «Olympiad: kitchen chemistry puzzles ★★★», a lesson of the chemistry course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: This olympiad lesson turns the kitchen into a puzzle room: each question joins two ideas from the course, and many hide a trap i --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/) [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/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/) / Olympiad: kitchen chemistry puzzles ★★★ # Olympiad: kitchen chemistry puzzles ★★★ Lesson 36 of the chemistry course of Mova's primary school: 15 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/36-olympiad-kitchen-chemistry-puzzles/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/0/) — This olympiad lesson turns the kitchen into a puzzle room: each question joins two ideas from the course, and many hide a trap in the wording. - [1](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/1/) — A good kitchen detective asks three things: is it a new substance or the same stuff in a new form, what got used up, and what changed - the warmth, the water, the air or the acid? - [2](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/2/) — Picture muffins coming out of the oven with green blueberries: too much baking soda turned the blueberry colour just as it turns red cabbage juice, and a squeeze of lemon would have kept them purple. - [3](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/3/) — Watch out for big talk: when Nan says "I've told you a million times, no foil in the microwave" she means many times, and when someone calls a pancake-thin sponge "a bit flat" they are playing it down. - [4](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/4/) — Every puzzle here is for thinking, not a recipe to try: hot sugar, boiling oil and kettles are a grown-up's job. - [5](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/5/) — Red cabbage juice is purple in neutral water, pink-red with acid and blue-green with baking soda; adding enough of the other one swings the colour back through purple. - [6](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/6/) — Blueberries hold the same kind of colour substance as red cabbage, so too much baking soda in the batter turns them greenish. - [7](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/7/) — Melting, freezing, boiling, dissolving and condensing can be undone, like chocolate that melts at about 34 °C and sets again; frying an egg, toasting bread and baking a cake cannot be undone. - [9](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/9/) — Salty water freezes below 0 °C, so ice with salt gets much colder than ice alone, cold enough to freeze ice cream in a bag. - [10](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/10/) — Fresh pineapple stops jelly setting because it holds a substance that cuts gelatine; tinned pineapple has been heated, which spoils that substance, so jelly with tinned pineapple sets. - [11](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/11/) — Water that is too hot kills yeast, and dough in a cold place rises only slowly. - [13](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/13/) — A cold can gets wet on the outside because water vapour from the air condenses on it; it is not leaking. - [14](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/14/) — Hot water dissolves sugar faster than cold water, and fine sugar dissolves faster than a lump; stirring helps too. - [17](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/17/) — In a fair test you change only one thing; if two things change at once, you cannot tell which one made the difference. - [18](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/36-olympiad-kitchen-chemistry-puzzles/18/) — Words from round the world: "nesh" (North of England and Midlands) means feeling the cold easily, "bussin'" (young US slang) means really tasty, and "fixin' to" (southern US) means about to. - ← previous: [Famous discoveries told as stories](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/35-famous-discoveries-stories/) - next →: [Olympiad: everyday chemistry detectives ★★★](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/37-olympiad-everyday-chemistry-detectives/) - ↑ back to [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/)