Parts are related to a whole.

A whole is related to its parts.

Parts are related to parts.

System is a group of related objects.

Most things are made of parts.

Somethings may not work if a part is missing.

When parts are put together they can do things they can't do alone.

System is a group of related objects that work together for a particular purpose (machines, organism).

The parts in a system interact with the other parts to cause the system to work. A system may not work if a part is missing, broken, worn out, mismatched, or misconnected.

System is a group of related objects or components that form a whole. Can be concrete objects, groups of objects, processes, or ideas. Some systems have boundaries with input and output of resources and feedback. Output for one part of a system can be input for another. Such feedback is used to control the system.

Systems are used as units of investigations.

Thinking about how a system works means observing and collecting date on each part and how each part interacts with the others.

Systems can be connected to other systems and thought of as a subsystem.

Most of the time certain events happen in a similar manner.

Some events are more likely to happen than others.

Some events can be predicted more accurately than others.

Sometimes people aren’t sure what will happen because they don’t know everything that might be having an effect on the event.

Often a person can find out about a group of things by studying just a few of them.

Variables affect the order of events.

Order is required to understand the world and predict events.

Probability is the relative certainty or uncertainty that people assign to events happening or not happening in a certain place or time.

Creating knowledge through observation of different variables influence on objects, organisms, populations, communities, and events helps create better explanatory models.

Objects,organisms, events, and systems can be organized in groups with similar properties.

Objects are classified by their common properties.

Organization of objects, organisms, events, and systems help people understand similarties and differences that in turn help understand the world.

Organizations such as the periodic table, classification of animals, properties of matter, cells, tissues, organs, organisms, populations, communities, and ecosystems have helped in developing explanations about these objects and their interactions.