10. Simulations

Computer simulations use computer models to also predict how a system will behave given a certain set of conditions.  Again, they are created through the use of mathematical formulas.

The difference between a model and a simulation is that a simulation also uses something physical to mimic parts of the system.

A very good example of a simulation is a flight simulator. To the trainee pilot, the cockpit is just like the real thing. They look out the window of the simulator and they see a computer generated view. If they pull the joystick here and there, the simulator moves around just like the real thing - all the instruments produce realistic readings - just like the real thing.

The key thing of course is that it is completely safe. Pilots learn to fly without risk to anyone.

Simulators can also be built just for entertainment such as the ‘body wars’ ride at Disneyland.