Across
- 4. A flat bar or plank that can move about a fixed point.
- 7. When a machine sends, passes on, or spreads energy from one place to another
- 8. The __________ gear is gear that is in front of a gear train. It is attached to a handle or motor.
- 10. The ___________ screw is a mechanical device made of a long tube with a large screw inside.
- 12. The power or strength of the energy that a machine uses or produces
- 13. The __________ gear comes after the driver gear.
- 15. The entire, complex machine, all parts working together.
- 18. There are _______ different classes of levers.
- 20. The individual parts (usually simple machines) that make up subsystems.
- 23. Made of a wire, rope or cable that moves along a groove in a wheel.
Down
- 1. The pivot
- 2. The _______ Wheel had a long rope with buckets tied around it that would collect water from a source and lift it up.
- 3. An object that looks like a wheel with teeth around the outside edge.
- 5. Parts joined together to make a machine or part of a machine
- 6. The thin edge of the ________ is put in position of an object and then the object begins to spread apart as the wider part of it gets pushed into it.
- 9. The force that is put into a lever for it to do work.
- 11. A part of the whole machine that includes certain parts working together to do a certain job.
- 14. A cylindrical shape that had a long groove cut in a spiral running around and around it.
- 16. ____________ machines are tools that use energy but make work easier.
- 17. A ____________ and axel is a simple machine that helps cars drive and allows us to shut off heavy duty valves with little force.
- 18. A gear _______ is when two or more gears are used together.
- 19. ___________ machines are made up of two or more interconnected simple machines working together.
- 21. Something that humans have created or built to help them do work and make jobs easier
- 22. Makes it easier to move objects by sliding or rolling them up or down instead of lifting them straight up or down.
- 24. The object that you do work on with a lever.