--- title: Bicycles and other wheels — a lesson of Mova's school · trees and pragmatics description: «Bicycles and other wheels», a lesson of the technology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: A bicycle turns the push of your legs into rolling. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/) [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/) / [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/) / Bicycles and other wheels # Bicycles and other wheels Lesson 25 of the technology course of Mova's primary school: 21 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/technology/25-bicycles-and-other-wheels/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/0/) — A bicycle turns the push of your legs into rolling. - [1](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/1/) — Your feet push the pedals, the pedals turn the big chain wheel, the chain turns a small cog on the back wheel, and the back wheel pushes the bike forward. - [2](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/2/) — Standing still on a bike you topple at once, but when you ride you hardly have to think. - [3](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/3/) — While moving, you keep steering the front wheel a tiny bit towards the side you are falling to, which brings the wheels back under you; the faster you go, the easier these small corrections are. - [4](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/4/) — Gears change how hard each turn of the pedals is. - [5](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/5/) — Going up the steep hill to school, you click to a bigger back cog: you pedal more turns, but each turn is easy. - [6](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/6/) — A bike is one of the most energy-saving ways a person can travel, and with a helmet, lights, good brakes and a safe place to ride, it is a great way to get around. - [7](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/7/) — Pedals turn a chain wheel, the chain turns a cog on the back wheel, and you balance by steering and moving forward; it is easier to balance when you go faster. - [8](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/8/) — Moving the chain to a bigger back cog makes pedalling easier but slower, good for hills; a smaller back cog makes it harder but faster. - [9](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/9/) — Change gears while pedalling gently. - [11](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/11/) — Use both brakes, the front one gently: squeezing only the front brake hard can throw you over the handlebars. - [12](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/12/) — A helmet is a hard shell over foam that crushes in a crash and absorbs the hit; the foam only works once, so a helmet must be replaced after a crash even if it looks fine. - [13](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/13/) — Wear it level and strapped. - [14](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/14/) — A bike needs a white light at the front and a red light at the back at night; reflectors are made of tiny corner shapes that send light straight back to where it came from, such as a driver's headlights. - [15](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/15/) — A puncture is a hole that lets air out of the inner tube; dip the pumped-up tube in water and bubbles show where the hole is, then it can be patched or the tube replaced. - [16](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/16/) — An electric bike has a battery and motor that help while you pedal; in the UK the motor must stop helping at about 15.5 mph (25 km/h). - [17](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/17/) — E-bike batteries must be charged only with the right charger, on a hard surface, and not overnight in a bedroom or hallway. - [18](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/18/) — Skateboard and scooter wheels spin easily because of bearings, rings of little steel balls; ride them with a helmet and pads, away from roads. - [19](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/19/) — A motorbike leans into bends to turn; motorbikes are fast and hard to see, so look twice before crossing. - [20](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/20/) — A bike lane gives bikes their own space; lanes separated by kerbs keep cars out, but riders still watch for opening car doors and turning vehicles. - [21](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/21/) — A bicycle has 2 wheels, a tricycle has 3, and a car has 4. - ← previous: [Ships, ports and submarines](https://md.mova.elamur.ai/free/en/corpora/school/technology/24-ships-ports-and-submarines/) - next →: [Escalators and lifts](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/) - ↑ back to [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/)