| A | B |
|---|
| volcano | a type of mountain that has an opening through which lava, ash, or volcanic rock flow |
| erupt | to burst out |
| lava | hot, melted rock that comes out of a volcano |
| magma | hot, melted rock and gases deep inside the earth |
| earthquake | shaking or sliding of the surface of the earth |
| landform | a shape on the earth's surface |
| plain | a large, flat area of land |
| plateau | a large, flat area of land that is high |
| weathering | the breaking apart and changing of rocks |
| erosion | the carrying away of weathered rocks or soil by water, wind, or other causes |
| glacier | a huge amount of moving ice |
