--- title: Sunshine, vitamin D and water — a lesson of Mova's school · trees and pragmatics description: «Sunshine, vitamin D and water», a lesson of the medicine course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Sunlight carries invisible ultraviolet (UV) rays: a little UVB on your skin helps it make vitamin D for strong bones, but too much burns th --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/) [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/) / Sunshine, vitamin D and water # Sunshine, vitamin D and water Lesson 23 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/23-sunshine-vitamin-d-and-water/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/0/) — Sunlight carries invisible ultraviolet (UV) rays: a little UVB on your skin helps it make vitamin D for strong bones, but too much burns the skin and damages it for life. - [1](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/1/) — You never need to burn to make vitamin D: a short time outside in summer is enough, and then it's shirt, sun cream, hat, shade and sunglasses. - [2](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/2/) — Your body is more than half water, and you lose some with every breath, every drop of sweat and every wee, so it needs topping up all day. - [3](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/3/) — Picture a sports day in July: by lunchtime the kids who forgot their bottles have headaches and dark yellow wee, while the ones sipping water all morning are still running. - [4](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/4/) — UVB rays in sunlight help the skin make vitamin D, which helps the body absorb calcium for bones, and you don't need to burn to make it. - [5](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/5/) — Sun cream should be at least SPF 30 with good UVA protection, put on before going out and reapplied often, especially after swimming or sweating. - [6](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/6/) — UV rays can damage the eyes too, so sunglasses should carry a UV-protection mark, and dark lenses alone don't mean better protection. - [7](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/7/) — Clouds don't block all UV rays, so you can burn on a cloudy, windy or cool day; the UV index on weather apps shows how strong the sun is. - [9](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/9/) — Even mild dehydration can cause headaches, tiredness and poor concentration, and you can be dehydrated before you feel thirsty. - [10](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/10/) — UK advice for children is about 6 to 8 drinks a day, more in hot weather or exercise, and milk and watery foods count as well as water. - [11](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/11/) — Pale straw-coloured wee is a sign of drinking enough, and dark yellow wee is a sign the body needs more water; wee as clear as water every single time isn't the goal either. - [12](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/12/) — Heat exhaustion makes people dizzy, sick and sweaty, and needs shade, water and cooling; heatstroke, with confusion, fainting or hot dry skin, is an emergency for 999. - [13](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/13/) — Fizzy drinks have lots of sugar and acid, and energy drinks have caffeine, which can upset sleep and speed up the heart, so health advice says children shouldn't have them; even diet fizzy drinks, with no sugar, are still acidic and wear away teeth. - [14](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/14/) — Many UK shops already refuse to sell energy drinks to under-16s, and a legal ban on such sales in England was announced in 2025. - [15](https://md.mova.elamur.ai/free/en/corpora/school/medicine/23-sunshine-vitamin-d-and-water/15/) — Being able to drink water in class helps children drink enough and concentrate. - ← previous: [Mum's vitamin and cod-liver oil](https://md.mova.elamur.ai/free/en/corpora/school/medicine/22-mums-vitamin-and-cod-liver-oil/) - next →: [Sugar, teeth and the dentist](https://md.mova.elamur.ai/free/en/corpora/school/medicine/24-sugar-teeth-and-the-dentist/) - ↑ back to [Medicine](https://md.mova.elamur.ai/free/en/corpora/school/medicine/)