--- title: Water: the most amazing liquid — a lesson of Mova's school · trees and pragmatics description: «Water: the most amazing liquid», a lesson of the chemistry course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Water looks plain, but it is a very strange liquid. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/) [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/) / Water: the most amazing liquid # Water: the most amazing liquid Lesson 34 of the chemistry course of Mova's primary school: 16 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/34-water-amazing-liquid/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/0/) — Water looks plain, but it is a very strange liquid. - [1](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/1/) — Its tiny molecules pull hard on each other, and at the surface that pull makes a stretchy "skin" strong enough for a pond skater to walk on. - [2](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/2/) — The same pull makes water climb: dip the corner of a paper towel into juice and watch the colour creep upward, against gravity, as water clings to the fibres and drags more water behind it. - [3](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/3/) — Most solids sink in their own liquid, but ice floats in your drink. - [4](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/4/) — When water freezes its molecules spread out into an open pattern, so ice is lighter than the same amount of liquid water. - [5](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/5/) — Water dissolves more things than almost any other liquid, so water in nature is never quite pure: the sea is salty, tap water carries minerals, and that is why a kettle grows white limescale. - [6](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/6/) — Tap water is cleaned before it reaches you: it is left to settle, filtered, and treated with a little chlorine to kill germs; many places in the world still lack clean water. - [7](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/7/) — Water molecules pull tightly on each other at the surface, making surface tension; pond skaters walk on it and a paperclip laid gently can float. - [8](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/8/) — Water climbs up a paper towel because it clings to the fibres and pulls more water up behind it; plants use this kind of climbing, with other forces, to lift water. - [9](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/9/) — Ice floats because water spreads out when it freezes, so ice is lighter than the same amount of liquid water; most solids sink in their own liquid. - [10](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/10/) — Rivers carry tiny amounts of salt from rocks into the sea; water evaporates from the sea but the salt stays behind, so the sea is salty. - [12](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/12/) — In the water cycle water evaporates, rises, cools and condenses into clouds, then falls as rain; the same water goes round and round, so the water you drink may once have been drunk by a dinosaur. - [13](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/13/) — About 60 parts in 100 of an adult's body is water; it carries food and waste around the body, and we lose water by breathing, sweating and weeing. - [14](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/14/) — Boiling water kills most germs, but it does not take out salt or harmful chemicals. - [15](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/15/) — Hard water has minerals dissolved from chalk and limestone rocks; when it is heated the minerals come out as white limescale on kettles and taps. - [16](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/34-water-amazing-liquid/16/) — Water dissolves more substances than almost any other liquid, because its molecules have slightly charged ends that pull particles apart; that is why it is called the universal solvent. - ← previous: [The air we breathe](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/33-the-air-we-breathe/) - next →: [Famous discoveries told as stories](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/35-famous-discoveries-stories/) - ↑ back to [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/)