Across
- 4. the geological process in which earthen materials are worn away and transported by natural forces such as wind or water.
- 5. A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life
- 6. elongated low area often running between hills or mountains
- 8. an area of low-lying land which is flooded in wet seasons or at high tide, and typically remains waterlogged at all times
- 10. a natural upward projection of the earth's surface, higher and steeper than a hill and often having a rocky summit
Down
- 1. area of land where all flowing surface water converges to a single point
- 2. a vast, flat, treeless Arctic region of Europe, Asia, and North America in which the subsoil is permanently frozen
- 3. soil or underwater sediment which continuously remains below 0 °C for two years or more
- 7. an imaginary line around the middle of a planet or other celestial body
- 9. deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales