--- title: Electricity — circuits, switches and safety — a lesson of Mova's school · trees and pragmatics description: «Electricity — circuits, switches and safety», a lesson of the world course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Electricity is a flow of tiny charged particles through a material. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/world/55-electricity/) [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/) / [World](https://md.mova.elamur.ai/free/en/corpora/school/world/) / Electricity — circuits, switches and s… # Electricity — circuits, switches and safety Lesson 55 of the world course of Mova's primary school: 19 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/world/55-electricity/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/0/) — Electricity is a flow of tiny charged particles through a material. - [2](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/2/) — Electricity only flows around a complete loop called a circuit: from one end of the battery, through the wires and a bulb, and back to the other end. - [3](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/3/) — If there is any gap, the flow stops and the bulb goes out. - [4](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/4/) — A switch is a gate in the circuit. - [5](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/5/) — When it is on, it closes the gap and the bulb lights; when it is off, it opens a gap and the flow stops. - [6](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/6/) — Conductors, such as copper and other metals, let electricity flow easily. - [7](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/7/) — Insulators, such as plastic, rubber, wood and glass, stop it — that is why wires are metal inside and covered in plastic. - [8](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/8/) — Mains electricity from wall sockets is far stronger than a small battery and can kill. - [9](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/9/) — Never poke things into sockets, never touch plugs with wet hands, and keep away from power lines and substations (fenced places full of big electrical equipment). - [10](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/10/) — Electricity flows only around a complete circuit. - [11](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/11/) — A gap anywhere in a circuit stops the electricity flowing. - [12](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/12/) — A switch opens and closes a gap in a circuit. - [13](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/13/) — A battery stores chemical energy and pushes electricity around a circuit. - [14](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/14/) — Metals such as copper, iron and aluminium are good conductors. - [15](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/15/) — Plastic, rubber, wood and glass are insulators. - [16](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/16/) — Water with impurities (tiny bits of other things mixed in it), like tap water, can conduct electricity, so water and electricity are dangerous together. - [17](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/17/) — Electric wires are made of metal inside with a plastic coating outside. - [18](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/18/) — Adding more batteries in a row makes a bulb glow brighter. - [19](https://md.mova.elamur.ai/free/en/corpora/school/world/55-electricity/19/) — Mains electricity is much stronger than a battery and can kill. - ← previous: [Sound — vibrations, loudness, pitch and echoes](https://md.mova.elamur.ai/free/en/corpora/school/world/54-sound/) - next →: [Energy — where it comes from and how to save it](https://md.mova.elamur.ai/free/en/corpora/school/world/56-energy/) - ↑ back to [World](https://md.mova.elamur.ai/free/en/corpora/school/world/)