| A | B |
| Systems | A group of parts that interact to accomplish a task |
| Matter | The “stuff” of the world. There is solid, liquid, and gas “stuff.” |
| Subsystems | Mini-systems that work together to make a larger system. |
| Forms of Energy | Light, thermal (heat), chemical, kinetic (motion), sound, and electricity are all energy. |
| Output | Matter, energy, or information that flows out of a system. |
| Open System | A system where energy and stuff (matter) can flow through a system. |
| Whole | Connected parts that make a complete system. |
| Closed System | A system where ONLY energy (not stuff) can flow through the system. |
| Part | One piece of a system that has a specific role or function. |
| Boundary | Defining where a system “ends.” Can be moved depending on the question you are trying to answer. |
| Function | The purpose or role of something. What something does… It’s job. |
| Input | Matter, energy, or information flowing into a system. |