NATURE 2

2. A layer of soil or rock that remains permanently frozen, found in polar regions.
4. A landscape formed from the dissolution of soluble rocks such as limestone, characterized by sinkholes, caves, and underground drainage systems.
6. A steep, amphitheater-shaped hollow formed at the head of a glacier valley.
8. A large single upright block of stone or rock, often shaped by erosion or weathering.
9. The rigid outer layer of the Earth, consisting of the crust and upper mantle.
11. A hollow rock lined with crystals or other mineral matter.
13. A large area of flat grassland, often with few trees, found in semi-arid regions.
14. A ridge of rock, sand, or coral that rises to or near the surface of a body of water.
15. A large volcanic crater, typically formed by the collapse of a volcano's summit.
16. A biome characterized by coniferous trees and cold temperatures, found in northern regions. Forest
18. A poisonous plant belonging to the parsley family, often found in temperate regions.
19. A deep, narrow valley with steep sides, often carved by a river.

1. Relating to or resembling crystals; having a regular atomic structure.
3. A hot, dry wind that originates in the Sahara Desert and blows across the Mediterranean.
5. An opening in the Earth's crust, often near volcanoes, from which steam and gases are emitted.
7. The production and emission of light by a living organism.
8. A mass of rocks and sediment carried and deposited by a glacier.
10. The regions of the Earth's surface and atmosphere inhabited by living organisms.
12. Relating to or characteristic of summer.
17. A shallow body of water separated from a larger body of water by barrier islands or reefs