Science

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