| A | B |
| Closing the Loop | A link in the circular chain of recycling events that promotes the use of products made with recycled materials. |
| Electronic Communication | System for the transmission of information using electronic technology |
| Engineering | The application of scientific, physical, mechanical and mathematical principles to design processes products and structures that improve the quality of life |
| Equilibrium | The ability of an ecosystem to maintain stability among its biological resources so that there is a steady optimum yield |
| Fact | Information that has been verified |
| Homeostasis | The tendency for a system to remain in a state of equilibrium by resisting change |
| Inquiry | A systematic process for using knowledge and skills to acquire and apply new knowledge |
| Model | A description analogy or a representation of something that helps us understand it better |
| Patterns | Repeated processes that are exhibited in a wide variety of ways; identifiable recurrences of the element and or form. |
| Recycling | Collecting and reprocessing a resource or product to make into new products |
| Scale | Relates concepts and ideas to one another by some measurement, provides a measure of size and or incremental change. |
| Science | Search for understanding the natural world using inquiry and experimentation |
| System | A group of related objects that work together to achieve a desired result |
| Closed Loop System | A group of related objects that have feedback and can modify themselves |
| Open Loop System | A group of related objects that do not have feedback and cannot modify themselves. |
| Subsystem | A group of related objects that make up a larger system |
| Theory | Systematically organized knowledge applicable in a relatively wide variety of circumstances especially a system of assumptionsaccepted principles and rules of procudure devised to analyze predict or otherwise explain the nature or behavior of a specified set of phenomena |
| Tool | Any device used to extend human capability including computer based tools |
| Transportation systems | A group of related parts that function together to perform a major task in any form of transportation |
| Trophic Levels | The role of an organism in nutrient and energy flow within an ecosystem. |