Any change to a part of the system could affect the rest of the system to different extents. That is, a part of the system may not work (well) if another part is missing or not working (well). Conversely, when the parts are put together, they can perform functions that cannot be carried out by individual parts. By conducting scientific investigations, we can construct and test explanations to discover how parts of a system affect one another and learn about the structures and functions of these parts. This also allows us to develop and test solutions for problems in natural systems.

● How do parts of a system or different systems work together to perform a function?

● How could parts of a system affect the function of other parts?

● How may a system be affected when a part or parts of the system do not behave in a consistent manner and what can be done to make these parts behave in a consistent manner?

● A system is a whole consisting of parts that work together to perform a function.

● Parts of a system can influence one another and hence the whole system.

● The functions of a system may be disrupted if a part or parts of the system do not function well.

Chapter 13: Electrical Systems

Chapter 14: Human Digestive System

Chapter 15: Transport Systems in Living Things

Chapter 16: Human Sexual Reproductive System