| A | B |
| Consumed by all | Public Good |
| Minimum price level | Price Floor |
| Maximum Price level | Price Ceiling |
| Market Equilibrium | Crossroads |
| Surplus | Prices are too high |
| Shortage | Prices are too low |
| Qty supply more than qty demand | Surplus |
| Qty Demand more than qty Supply | Shortage |
| consumers/producers satisfied | market equilibrium |
| Pollution | Negative Externality |
| Gas Station makes $ off Century students | Positive Externality |
| May come from Price system flexibility | Instability |
| What do we do at the crossroads | Dance |
| 3 Economic Questions | What , How, for whom to produce |
| Price system established itself through | Trial and error |
| Best class at Century | Economics |