| A | B |
|---|
| checkpoint | a place along a route where people sign in |
| musher | the driver of a dog sled team |
| experienced | having knowledge to do a particular task |
| courageous | brave; fearless |
| blizzard | snowstorm with heavy winds |
| rugged | having rough, uneven surface |
| magnificent | exceptional, extraordinary |
| weathering | a process which causes exposed rock to decompose |
| erosion | the surface of the earth is worn away by water, wind or ice |
| originate | where something began, the beginning of an idea |
