| A | B |
|---|
| landform | a natural shape or feature on the Earth's surface |
| mountain | a place on Earth's surface that is much higher than the land around it |
| valley | a lowland area between higher lands such as mountains |
| canyon | a deep valley with very steep sides |
| plain | a flat area on Earth's surface |
| plateau | a flat area higher that the land around it |
| barrier island | a thin island near a coast with wide sandy beaches |
| weathering | the way rocks are broken down into smaller pieces and always changing the surface of the Earth |
| erosion | the movement of weathered rock and soil |
| glacier | a huge sheet of ice |
| earthquake | the shaking of Earth's surface caused by movement of the crust where it meets the mantle |
| volcano | an opening in Earth's surface from which lava flows |
| flood | a large amount of water that covers normally dry land |
