| A | B |
|---|
| Coral reef | structure at or near the water’s surface formed by the skeletons of small sea animals |
| Megalopolis | pattern of heavy urban settlement over a large area |
| Contiguous | joined together inside a common boundary |
| Free enterprise system | built on the idea that individual people have the right to run businesses to make a profit |
| Service industry | is a business that provides services to people instead of producing goods |
| Navigable | wide and deep enough to allow the passage of ships |
| Fossil fuels | coal, oil, and natural gas |
| Acid rain | rain containing high amounts of chemical pollutants |
| Landfills | the areas where trash companies dump the waste they collect |
| Recycling | reusing materials instead of throwing them out |
| Free trade | taking down trade barriers such as tariffs and quotas so that goods flow freely among countries |
| Colony | overseas settlements tied to a parent country |
| Representative democracy | voters choose leaders who make and enforce the laws |
| Federal republic | power is divided between the federal, or national, government and the state governments |
| Secede | withdrew from the national government |
| Immigrant | people who move to a new country to make a permanent home |
| Rural | countryside areas |
| Urban | city dwellers |
| Suburb | smaller communities surrounding a larger city |
