Across
- 2. Animals without a backbone
- 4. The potato-shaped dwarf planet
- 9. A landform that is surrounded by water on all sides
- 10. The second body part of an insect
- 11. Dust cloud where the stars are formed
- 12. The sound of lightening
Down
- 1. An African grassland
- 3. Animals that give birth to their young
- 5. Negatively charged particles
- 6. Vertebrates that can breathe underwater with gills
- 7. The first element formed in the Universe
- 8. Insects always have _____ legs