| Term | Definition |
|---|---|
| hazardous waste | Waste that is potentially harmful to the environment or others’ health. |
| recycle/recyclability | To convert waste into reusable materials. |
| circuit board | A thin, rigid board containing an electrical circuit. |
| etch | To cut or carve a design into a surface. |
| concentration | A close gathering or grouping together of sub-units of a substance or object. |
| dilution/serial dilution | The action of making a liquid weaker/thinner, typically by adding another liquid. |
| indicator | A display or sign of some sort that signals the state or level of something. |
| combustion | The process of burning something. |
| incineration | The process of destroying something via combustion. |
| reclaim/reclaimed/reclamation | To extract a substance from another substance to get it back again. |
| filtrate | A liquid that has passed through a filter. |
| precipitate/precipitation | The formation of a solid from a chemical reaction. |
