Video and lesson investigations on the topic of modelling machines. Key concepts include:
- Making models of ‘real life’ machines is a good way of investigating how they work.
- Machines need some form of power to make them work.
- Simple materials can be used for making models.
- Models do not always exactly mirror the real object.
- ‘Low technology’ may look simple, but it can be very efficient.
- Machines can be made out of everyday, local materials.
- Human populations and needs can frequently be answered by technology. The problem of getting a fresh supply of water can be lessened by the use of fairly simple devices.
- Since a push is easier on the human frame to administer than a pull, machines that use pushes, rather than pulls, make our lives easier.
- Animals that work for us are also pushing (against their harness) though people often see them as pulling.