--- title: Ice on ponds and cold water in winter — a lesson of Mova's school · trees and pragmatics description: «Ice on ponds and cold water in winter», a lesson of the medicine course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Under the ice the water is only about 4 °C, and in water that cold the body gasps, then hands and legs stop working within minutes; --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/) [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/) / [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/) / Ice on ponds and cold water in winter # Ice on ponds and cold water in winter Lesson 74 of the medicine 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/medicine/74-ice-on-ponds-and-cold-water-in-winter/). - [1](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/1/) — Under the ice the water is only about 4 °C, and in water that cold the body gasps, then hands and legs stop working within minutes; people, children too, die on UK ice every winter, so the rule is simple: never go onto frozen ponds, lakes, rivers or canals. - [2](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/2/) — The deadliest moment is the rescue: people drown going onto ice after a friend or a dog, and dogs usually scramble out by themselves, so you stay on the bank, call 999, shout to them to keep still, and reach with a long branch or throw something that floats, never stepping onto the ice. - [3](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/3/) — Water pulls heat from your body about 25 times faster than air at the same temperature, and wet clothes keep pulling, so Ben, soaked to the knees on a frosty walk, was shivering hard and mumbling half an hour later: that's the body getting dangerously cold (hypothermia). - [5](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/5/) — Ice on ponds, lakes, rivers and canals can be thick in one spot and thin a few steps away, and you can't see how thick it is. - [6](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/6/) — Ice is often thinner in the middle, near reeds, near streams flowing in and over springs. - [7](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/7/) — The water under the ice is about 4 °C, more than 30 °C colder than your body. - [8](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/8/) — The advice of RoSPA (the Royal Society for the Prevention of Accidents) is never to go onto ice on ponds, lakes, rivers or canals, and people die every winter doing it. - [9](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/9/) — People drown going onto ice to rescue dogs, and dogs usually manage to get out by themselves. - [10](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/10/) — If someone goes through the ice: stay off it, call 999, tell them to keep still, and reach or throw something from the bank. - [11](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/11/) — Water pulls heat out of the body about 25 times faster than air at the same temperature. - [12](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/12/) — In cold water the hands and legs stop working within minutes, however tough you are. - [13](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/13/) — Strong shivering, slurred words and clumsiness are warning signs that the body is getting dangerously cold, called hypothermia, and when it gets worse you stop noticing the cold. - [14](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/14/) — Canals are often deeper than a child is tall, with steep sides and rubbish frozen in the ice. - [15](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/15/) — UK winter sea is about 8 °C; organised winter dips have lifeguards, and children, being smaller, lose heat even faster than adults, so they shouldn't go into winter water. - [16](https://md.mova.elamur.ai/free/en/corpora/school/medicine/74-ice-on-ponds-and-cold-water-in-winter/16/) — Sledges are hard to stop on packed snow and ice, so a slope that runs out onto water or a road is a trap. - ← previous: [Trampolines, playgrounds and skate parks](https://md.mova.elamur.ai/free/en/corpora/school/medicine/73-trampolines-playgrounds-and-skate-parks/) - next →: [Dares: cliffs, roofs, tombstoning, railways and saying no](https://md.mova.elamur.ai/free/en/corpora/school/medicine/75-dares-cliffs-roofs-tombstoning-railways-and-saying-no/) - ↑ back to [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/)