Vocabulary

3. it is a circular rotating bar used to transmit power and motion from one part to another
5. it is a machine that converts power (energy) into motion (movement)
8. synonym of “under”
10. it is a rotating wheel with teeth used to transform the speed of rotation and transmit the power
11. it is a small gear
12. synonym of “next to”
13. opposite of “in front of”
14. shape with four equal sides and right angles
15. it is a circular rotating object that is usually fixed under vehicles to make them move
16. natural material which composes trees
17. it is a machine that transforms rotational energy (like wind power or hydropower) into electricity

1. hard and strong grey material composed of iron and carbon
2. round shape that you can draw with a compass
4. material with which you make clothes
6. it is a red/brown metal with which you used to make coins
7. it is a device that transforms mechanical energy into electrical energy
9. synonym of “over”
12. it is a large flat part of a tool or machine, used to push back water or air.
14. a precious shiny grey/white metal