Engineering Crossword Puzzle

3. Systems that use liquid pressure to lift or move heavy things
5. Toothed wheels that fit together to change speed or motion
7. How much a material stretches or changes shape when force is applied to it
9. To press or squeeze something to make it smaller or tighter
11. An early test model built to try out an idea before making the real thing
12. A complete path that electricity flows through to power things
13. A detailed plan or drawing for how to build something
15. How air moves around objects like cars or airplanes
16. Joining metal pieces together by heating them until they melt into one piece
18. The pulling force that keeps our feet on the ground
19. A wheel with a grooved rim and rope used to pull or lift heavy weights easily

1. The force that slows things down when two surfaces rub together
2. A simple rigid bar used to lift heavy objects with less effort
4. A sliding plug inside a tube that pushes or is pushed by gas or liquid
6. Panel, A device that turns sunlight directly into electricity
8. A wheel with blades that spins when pushed by wind water or steam to generate power
10. The point on which a lever rests or pivots to lift something
13. A structure built to span physical obstacles like rivers or roads
14. A machine that turns energy or fuel into movement
17. The total weight or force that a structure has to support