--- title: Fizzy drinks, Mentos and cola — a lesson of Mova's school · trees and pragmatics description: «Fizzy drinks, Mentos and cola», a lesson of the chemistry course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Twist the cap of a fizzy drink and it hisses. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/) [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/) / Fizzy drinks, Mentos and cola # Fizzy drinks, Mentos and cola Lesson 19 of the chemistry course of Mova's primary school: 20 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/19-fizzy-drinks-mentos-and-cola/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/0/) — Twist the cap of a fizzy drink and it hisses. - [1](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/1/) — In the factory, carbon dioxide gas was squeezed into the drink under pressure; the moment you open it, the pressure drops and the gas starts escaping as bubbles. - [2](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/2/) — A gas bubble needs a tiny place to get started: a scratch in a glass, a speck of dust, a raisin's wrinkly skin. - [3](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/3/) — That is why bubbles stream up from the same spots, and why raisins in lemonade bob up and down as bubbles stick to them and pop off at the top. - [4](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/4/) — Drop Mentos into a bottle of diet cola (outside, with an adult, standing well back) and a fountain shoots up. - [5](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/5/) — It is mostly physics, not a new reaction: the sweets' rough skin is covered in tiny pits where thousands of bubbles form all at once. - [7](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/7/) — And a can of ordinary cola hides about seven teaspoons of sugar: the acid and fizz cover up the sweetness. - [8](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/8/) — Fizzy drinks have carbon dioxide squeezed into them under pressure; opening the cap lets the pressure out and the gas escapes with a hiss. - [9](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/9/) — Shaking a bottle makes many tiny bubbles that grow quickly when it is opened, so it sprays. - [10](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/10/) — In the Mentos and cola fountain, tiny pits on the rough sweets help bubbles form very fast; it is mainly physics, not a chemical reaction. - [11](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/11/) — Diet cola makes a bigger fountain because its ingredients help bubbles form even faster; the fountain is done outside, with an adult, at a distance. - [12](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/12/) — Bubbles start at tiny places like scratches or specks; some glasses have marks etched in the bottom to make a stream of bubbles on purpose. - [13](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/13/) — An open drink goes flat as the gas slowly escapes; squeezing a half-empty plastic bottle before closing does not keep it fizzier. - [14](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/14/) — Raisins in lemonade rise when bubbles stick to them like floats and sink again when the bubbles pop at the top. - [15](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/15/) — Warm drinks hold less dissolved gas, so pressure in a can rises and cans left in a hot car can burst. - [16](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/16/) — A home fizzy-water machine pushes carbon dioxide from a cylinder into water under high pressure. - [17](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/17/) — Some spring water is naturally fizzy, because the water picked up gas underground. - [18](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/18/) — One can of ordinary cola has about seven teaspoons of sugar; diet drinks use sweeteners with almost no sugar. - [19](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/19/) — A burp after a fizzy drink is the carbon dioxide coming back up; astronauts find burping hard because gas and liquid do not separate without gravity. - [20](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/19-fizzy-drinks-mentos-and-cola/20/) — The bubbles in sparkling wine are made by yeast inside the bottle; their corks fly out hard and must never be pointed at anyone's face. - ← previous: [The fizz: vinegar, lemon and soda](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/18-the-fizz-vinegar-lemon-and-soda/) - next →: [Gases all around: breath and balloons](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/20-gases-all-around-breath-and-balloons/) - ↑ back to [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/)