😝SCIENCE CROSSWORD😝

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Across
  1. 4. biological name for birds
  2. 5. nourish the baby inside the mother's body
  3. 7. lay eggs
  4. 9. the phylum vertebrates belong to
  5. 11. body varies with the temperature of the water
  6. 12. bony fish
  7. 13. live in and out of water
Down
  1. 1. jawless fish
  2. 2. give birth to live young
  3. 3. dry scaly skin
  4. 6. skeleton is made of cartilage
  5. 8. skeletons inside their body
  6. 10. give birth to a tiny undeveloped baby