It is a way scientists can know if something is alive or not. To be considered as alive, the object must have 5 caracteristics. The 5 characteristics of all living things are:
- It must grow until it can reproduce.
- It must consume, transform and store energy. (food, air, etc...) It must grow by absorbing energy in its environ.
- It must move from the outside (walking, hunting, eating, etc. ...) and/or inside (blood circulation, digestion, etc. ...)
- It must be able to reproduce (to create entities similar to itself)
- It must be able to detect the properties of its environment and act appropriately.
