Across
- 5. Animals that used wood pieces as "dust masks"
- 7. How scientists study animal behavior
- 8. A possible explanation for animal tool use
- 9. Primates that use sticks to catch termites
- 10. Objects chimps modify to catch food
- 11. Objects used to complete tasks
- 13. Items used by otters to crack shells
- 14. Material used in mole-rat experiments
- 15. Structures where termites live
Down
- 1. Another possible explanation for tool use
- 2. People who study animal tool use
- 3. Animals that use rocks to break open shells
- 4. Insects caught by chimps using sticks
- 6. What young chimps do by observing older chimps
- 12. Parts of a tree that chimps remove from branches