how animals survive

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Across
  1. 2. the animals that give birth to young ones
  2. 5. they do not have a backbone
  3. 7. slowing down of activity or settling down to a long sleep in the summer months
  4. 10. they have a backbone
  5. 13. the sleep during the winter months
  6. 14. animals that live on land
  7. 15. the mass movement of birds from a colder place to a warmer place
  8. 17. animals that feed both on plants and other animals
  9. 20. animals that are in danger of becoming extinct
Down
  1. 1. animals that have the same temperature all the time
  2. 3. animals that feed on plants
  3. 4. the animals that feed on other living organisms
  4. 6. animals that feed on dead animals
  5. 8. animals that have already disappeared from earth
  6. 9. they can be on both on land and water
  7. 11. the animals that feed on other animals
  8. 12. the animals whose body temperature changes according to the climate
  9. 16. the animals that spend most of their time on trees
  10. 18. they have scales on their body
  11. 19. animals that spend most of their time in air