| A | B |
|---|
| Reservoir | a lake used for collecting and storing water |
| Decade | a length of time that is 10 years |
| Century | a length of time that is 100 years |
| Transportation | ways of moving things from one place to another |
| Disaster | something that happens that caused great harm to a community |
| Lodge | a home made of logs, earth, and grass |
| Tepee | an easily moved shelter, made of poles covered with buffalo skins |
| Legend | a story that explains how something came to be |
| Canal | a waterway that is built by people |
| Causeway | a road built on soil piled up in shallow water |
| Empire | the land and peopleunder the control of a powerful nation |
| Archaeologists | a scientist who look for artifacts and explains how they were used |
| Tenochtitlan | the capital city of the Aztec empire |
| Artifact | an object that we find that was used by people in the past |
| Pollution | anything that makes the air, and, or water unclean |
| Solution | a way to solve a problem |
