| A | B |
| foothill | hill at the base of mountains |
| loess | fine, fertile soil deposited on the ground by wind |
| pampa | grass-covered plain of Argentina |
| estuary | area at the mouth of a river where saltwater from a sea mixes with freshwater from a river |
| temperate | neither very hot nor very cold |
| alpaca | animal similar to a llama with silky hair |
| llama | animal related to the camel, used to carry things |
| death rate | number of deaths over a given period of time |
| agribusiness | farming with large farms and lots of machines and chemicals |
| clear-cut | to cut down every tree in a forest |
| global warming | rise in Earth's temperature caused by too much carbon dioxide in the air |