| A | B |
|---|
| earthquake | a shaking of Earth's surface caused by the sudden breaking of masses of rock along a fault. |
| eruptions | processes of throwing forth |
| volcano | opening in Earth's crust through which steam, ashes, and lava are forced out in periods of activity |
| glacier | a great mass of ice that moves very slowly down a mountain or along a valley, or spreading very slowly over a land area |
| Impressive | able to impress the mind, feelings, conscience |
| naturalist | a person who studies living things |
| preserve | to keep from harm or change; protect |
| slopes | land that goes up or down at an angle |
| species | a set of related living things that share certain characteristics and that can interbreed |
| wilderness | a wild region with few or no people living in it |
| altitudes | heights above Earth's surface |
| formations | things that are formed |
| reservoir | a place where water is collected and stored for use |
