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Across
  1. 4. The organ that controls emotions and reactions
  2. 5. A popular gift that can trigger happy brain chemicals
  3. 11. A brain chemical linked to pleasure and reward
  4. 13. Actions influenced by brain chemistry
  5. 14. The science used to explain reactions in the brain
  6. 15. A practice repeated over time
  7. 16. Chemical messengers that influence feelings and behavior
  8. 17. A person’s emotional state
  9. 18. Items given to show care or affection
  10. 19. A feeling of happiness or enjoyment
  11. 20. The celebration observed each year on February 14
Down
  1. 1. Chemicals that send messages in the brain
  2. 2. The process of forming close emotional connections
  3. 3. A positive feeling caused by brain chemicals
  4. 6. Chemicals that create feelings of satisfaction
  5. 7. A chemical in chocolate linked to mood
  6. 8. A hormone that helps people bond and trust
  7. 9. A feeling of interest or connection to someone
  8. 10. Feelings such as happiness or excitement
  9. 12. A Valentine’s gift that appeals to the senses