| A | B |
|---|
| Change | the occurence of an event |
| Event | occurs when the properties of matter of a system are altered |
| Frame of Reference | a basis for comparison |
| Rate of Change | change in terms of how long it takes to occur |
| Cyclic Change | events that seem to follow set patterns and repeat themselves |
| Interface | the boundary between different materials or systems |
| Dynamic Equilibrium | a balance between changes |
| Polluted | when the concentration of any substance or form of energy reaches a proportion that adversely affects humans, their property, or the plant and animal life on which it depends |
