How do Animals Spend the Winter?

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Across
  1. 5. To keep heat in and cold out
  2. 9. A shelter where animals rest or sleep
  3. 10. Thick fat that keeps animals warm
  4. 12. The usual weather in a place
  5. 13. A plan or method used for survival
  6. 15. A change that helps animals survive
  7. 17. To gradually change or develop over time
  8. 18. Active at night
  9. 19. A lack of something needed, like food
  10. 20. A hole in the ground made by an animal
Down
  1. 1. Coloring that helps animals hide
  2. 2. The body’s process of using food for energy
  3. 3. Animals that hunt other animals
  4. 4. Moving from one place to another with the seasons
  5. 6. Temporarily inactive, like sleeping
  6. 7. To sleep during winter to save energy
  7. 8. The act of staying alive
  8. 11. Substances in food that help living things grow
  9. 14. A safe or protected place to live
  10. 16. An area an animal defends as its own