| A | B |
|---|
| obsidian | natural volcanic glass used to make very sharp blades for spears and arrows |
| slash and burn agriculture | farming method in which trees and other plants on a plot of land are cut down and burned to fertilize the soil. |
| quetzal | a colorful tropical bird |
| drought | prolonged period of little or no rain |
| hieroglyphic | symbol that stands for a word, idea, or sound |
| observatories | buildings for observing the sky |
| basin | a bowl-shaped area |
| chinampas | artificial islands |
| dike | a wall to hold back water |
| absolute monarchy | a system in which one person from a ruling family has unlimited powers |
| aqueducts | canals or pipes that carry fresh water |
