| A | B |
|---|
| avalanche | the rapid downhill fall of a large amount of snow |
| barrier | something that blocks the way |
| extinct | no longer active or living |
| erosion | the wearing away of soil and rock by the action of wind or water |
| gap | a low place in the mountains, often created by a river |
| hibernate | to go into a sleeplike state during winter while living off body fat |
| hydroelectric plant | a place that uses the force of moving water to power generators that make electricity |
| magma | molten, or melted, rock deep beneath the Earth's crust |
| mineral | a naturally occurring chemical substance found in Earth's crust |
| pass | a place in the mountains that is lower than the surrounding peaks and people use to get through the mountains |
| plateau | a large area of high but level ground, often located between mountain ranges |
| terracing | the building of level surfaces on a mountainside |
