Across
- 4. Where the sky seems to meet the land
- 5. Land next to the sea
- 7. A natural hole in the ground or mountain
- 9. Low land between hills or mountains
- 10. The natural world around us
- 11. Tiny grains found on beaches
- 12. Land surrounded by water
- 15. Loud sound after lightning
Down
- 1. A light wind
- 2. Hard natural material from the ground
- 3. Harmful things added to air, water, or land
- 6. Moving water in the ocean
- 8. Water covering land that is usually dry
- 13. Time when the sun goes down
- 14. A very dry area, lots of sand