Across
- 4. a landform with high elevation and high relief
- 5. a tall plant that has a wooden trunk and branches
- 6. someone whose job is to stop fires
- 8. an area of land that is lower than the land around it
- 9. a large fire that spreads quickly over a natural area
- 12. H2O
- 13. a small body of water
- 15. ice crystals from the sky
- 16. woods
Down
- 1. a measure of how hot or cold something is
- 2. a sudden spark from the clouds
- 3. 空气
- 5. the sound caused by lightning
- 6. overflow of water in a dry area
- 7. a mound of land, smaller than a mountain
- 9. moving air
- 10. a person who works on a farm
- 11. water falling from the sky
- 14. a long period of dry weather
- 17. the space over the Earth