amphibians

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Across
  1. 5. frogs are unable to live to live in this kind of water
  2. 6. how many main amphibian species are there?
  3. 8. what is the earliest known apmhibian species?
  4. 11. frogs have backbones, which also makes them ---
  5. 12. what are a group of frogs called
  6. 13. what time of day do salamanders hunt?
Down
  1. 1. how do frogs swallow their food?
  2. 2. frogs skin produce---
  3. 3. how many species of poisonous toads are there?
  4. 4. where does the word amphibian come from?
  5. 5. other than their lungs, what can frogs breathe through
  6. 7. frogs must stay close to water because they have ---- skin.
  7. 9. of the three main amphibian species, which is the largest
  8. 10. like butterflies,frogs go through a cycle called ----.