Earth

4. A piece of land surrounded by water on all sides.
6. A hollow or hole in the ground or in a hillside, often found in mountains or cliffs.
9. A deep, narrow valley with steep sides, usually carved by a river or erosion over time.
11. A huge body of saltwater that covers most of the Earth's surface.
13. One of the seven large landmasses on Earth, such as North America or Africa.
14. A large area of land covered with many trees and other plants.
16. A tall and rocky landform that rises high above the surrounding areas.
17. A low area of land between hills or mountains, often with a river flowing through it.

1. A huge mass of ice that slowly moves over land.
2. The sandy or pebbly shore beside a body of water, such as the ocean or a lake.
3. A mountain with a hole on top that sometimes erupts with hot lava, ashes, and gases.
5. A very dry and sandy place with little rainfall and sparse vegetation.
7. A shaking or trembling of the ground caused by the movement of tectonic plates.
8. A cascade of water falling from a height, often over a cliff or rocks.
10. The remains or traces of a prehistoric plant or animal preserved in rock or sediment.
12. The typical weather conditions in a specific region over a long period of time.
15. A long, flowing body of water that usually empties into a larger body of water.