Key Stage 4
Meaning
A system is an object or group of objects being studied by a scientist.
About Systems
There are three important types of system which can be observed by a scientist:
- Open System - In an open system mass and energy can get in and out. In these systems the laws of Conservation of Energy and Conservation of Mass cannot be observed.
- Closed System - In a closed system mass cannot get in or out, but energy can. In these systems the law of Conservation of Mass can be observed but the law of Conservation of Energy cannot.
- Closed Isolated System - In a closed isolated system neither mass nor energy can get in or out. In these systems both the laws of Conservation of Energy and Conservation of Mass can be observed.
References
AQA
- Systems, page 11, GCSE Physics; The Revision Guide, CGP, AQA
- Systems, page 167, GCSE Combined Science; The Revision Guide, CGP, AQA
- Systems, page 2, GCSE Physics, Hodder, AQA
- Systems, page 21, GCSE Combined Science Trilogy; Physics, CGP, AQA
- Systems, page 22, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
- Systems; closed, page 169, GCSE Physics, Hodder, AQA