What is a system? My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

A question to think about… What makes a system? My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

What if one part of the system fails? Non-living things What if one part of the system fails? A system is made up of many parts. Some systems like a bus and a car are man-made systems. There are many smaller systems in the bus and the car which have to work properly to keep the vehicles moving. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Non-living things The slippers shown below are made up of parts. Before the slippers can be worn for walking, the parts must be put together properly first. Can it work properly if its strap is snapped? Do you think a slipper is a system too? My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Living things Every living thing, plant or animal, is a natural system. A living thing is made up of many parts. Each part does a special job. All the parts work together to keep the living thing alive. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

What makes an animal a system? Living things What makes an animal a system? Parts of animals Animals have special parts to carry out their needs. Such needs include taking in air, food and water, and also removing wastes from their bodies. The eyes, mouth, nose and ears are some of the parts of animals that help them achieve these needs. My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

Living things Parts of plants A plant is also a system. A plant is made up of parts such as the stem, roots and leaves. leaf stem roots My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited

The end My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited