Across
- 3. The distance above sea level of a spot on Earth's surface
- 5. Having died out completely
- 6. A low place in the mountains, often created by a river
- 8. Melted rock from inside Earth's crust
- 11. A colorless or lightly colored hard mineral
- 13. The breaking up of Earth's materials into smaller pieces
- 15. To build level surfaces on a mountainside
- 19. A place in the mountains that is lower than the surrounding peaks and that people use as a path through the mountains
- 20. A large area of high, flat ground
- 21. A business that manufactures a product or provides a service
- 22. A place that uses the force of moving water to power generators that make electricity
- 25. A line of wagons traveling west in the United States in the 1800s
- 26. Magma, or melted rock, that reaches Earth's surface
- 27. Not likely to fall
Down
- 1. The imaginary east/west line on a globe or map that is an equal distance from the North and South Poles; 0° latitude
- 2. A naturally-occurring substance found in Earth's crust
- 4. Something that blocks movement
- 7. To stay alive
- 9. an idea or story that many people believe but that is not true
- 10. To go into a sleeplike state during winter and live off body fat
- 12. A wall used to stop the flow of water
- 14. The carrying away of soil and rock by water, ice, or wind
- 16. A large section of Earth's crust that is able to move
- 17. An animal similar to an ox that lives in Asia
- 18. A machine that makes electricity
- 23. A passage through or under a natural feature such as a mountain
- 24. The highest point on a mountain