| A | B |
|---|
| scarcity | something hard to find because there is so little of it |
| opportunity cost | deciding to buy something at a reasonable cost |
| market economy | producing and delivering products based on wants and needs |
| graphic representation | maps and graphs used to show geographic information |
| interdependence | people relying on eachother for ideas, goods, and services |
| spatial | location of space on the earth's surface |
| constitution | the laws that state the rights of the people in a country |
| physical systems | the Earth's four physical features and environments: climates, erosion, water cycles, and plant and animal life |
| legend | the words written beneath or beside a map or chart to explain it |
