| A | B |
|---|
| tundra | a treeless plain |
| isthmus | a narrow strip of land between two larger land masses |
| timberline | an imaginary line on mountains above which trees can not grow |
| Canadian Shield | a huge rocky region in northern Canada |
| chinampas | human-made islands, most about the size of a football field |
| tribute | taxes |
| Triple Alliance | the joining of the Aztec with Excoco and Tlacopan as a means to strengthen their power |
| codex | contained colorful pictures and drawings and told about the history, religion, government and science of the Aztec |
| distortion | errors that make a map less accurate |
| projection | a way of showing parts of Earth on a flat map |
| equal-area projection | good for comparing the sizs of land masses, but it distorts the shapes of land |
| mercator projection | near the equator there is little distortion and sizes are accurate too, but as you move away from the equator sizes become more distorted |
| polar projection | most show only half the globe or less, near the center there is little distortion, but near the edges there is distortion |
| terrace | level platforms of earth that climbed each hill like a staircase |
| quipu | special cords used by the Inca to recording important events |
| Machu Picchu | one of the mysteries of the Inca, no one is sure why it was built or why it was forgotten |
| diversity | differences |
| Three Fires Council | the Potawatomi, the Ottawa and the Ojibwa formed this group. Its main purpose was trade |
| wigwam | dome-shaped houses built by the Ojibwa |
| Bowating | a trading center that was centrally located for people who depended on boat travel |
