Across
- 5. Water-covered habitats.
- 6. Live in water.
- 7. Float in the sky.
- 8. Essential for life.
- 11. We breathe it.
- 13. Hard earth materials.
- 14. People.
- 15. Feed milk to their young.
- 17. Comes from the Sun.
- 18. Tall woody plants.
- 19. Plants grow in it.
- 20. Animals with feathers.
Down
- 1. Six-legged creatures.
- 2. Colourful plant parts.
- 3. Covers many lawns.
- 4. Large saltwater bodies.
- 6. Areas with many trees.
- 9. Make their own food.
- 10. Falls from clouds.
- 12. Scaly animals.
- 15. High landforms.
- 16. Flowing freshwater.