2.  A complex machine is any machine made up of two or added simple machines. A simple machine is an elementary machine for making work easier. They modify or transmit force or motion. In a simple machine there is the wheel and the axle, the wedge and the jackscrew.  CHAIN  BACK WHEEL  BRAKE LEVERS  HANDLEBAR  PEDALS

3.  Simple machines, like ramps and levers, are simple. They have´t got many parts. Complex machines, like clock, are complex. They have got lots of parts.

6.  A mechanism is a combination of moving parts that perform a specific action.

7.  The gears are metal wheels with special theeth that fit together.

8.  Gears have got many types of gears, I put something.  Rack and pinion  Worm  Spiral bevels  Sun and planet  Harmonic drive  Epicyclic

10.  A chair of a bicycle is a support that helps you to pedal better and not get tired so fast.

11.  The brake levers are connected to cables. These cables transmit the movement of the levers to the brakes on the wheels.

12.  The handlebar is a lever that changes the direction of the front wheel.

13.  The pedals are levers that turn a special wheel with gears, called a crank.

14.  SIMPLE AND COMPLEX MACHINES  SIMPLE AND COMPLEX MACHINES. SIMPLE AND COMPLEX MACHINES SIMPLE AND COMPLEX MACHINES

15.  COMPOUND MACHINES. COMPOUND MACHINES COMPOUND MACHINES  SIMPLE MACHINES. SIMPLE MACHINES SIMPLE MACHINES

16.  What is complex machines?  A complex machines is a any machines made up of two or added simple machines.  What is a mechanism?  A mechanism is a combination of moving parts that perform a specific action.  What is break levers?  The brake levers are connected to cables.  What is pedals?  The pedals are levers that turn a special wheel with gears, called a crank.

17.  I HOPE YOU LIKED IT, OSCAR AND COMPANY.  BY MANUELA LOPEZ SANCHEZ.  PIO BAROJA.