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Discussion Questions
Explore Differences Between Ectotherm
s and Endotherms

Build Background Knowledge

  • What does it mean to be warm-blooded or cold-blooded?
  • What do the words ectotherm and endotherm mean?
  • What are some defining characteristics of endotherms and ectotherms?

Focus on Monarchs as Ectotherms:

  • Why do monarch butterflies move so slowly in cold temperatures?
  • How do monarch butterflies respond to changes in surrounding temperatures?
  • What temperature-related dangers do monarchs face when they overwinter in the oyamel fir forests in Mexico?
  • What temperatures do monarchs need to be active?
  • What happens to monarch butterflies if they get too cold? Too warm?
  • Why is the ability to conserve energy important for monarch survival?
  • What behaviors help monarchs warm their muscles when surrounding temperatures paralyze them?
  • Why do monarchs bask in the sun and/or shiver?
  • What happens to monarch body temperature when outside temperatures fluctuate?

Compare and Contrast Humans and Monarch Butterflies (Endotherms and Ectotherms):

  • How does your body temperature compare to a monarch's?
  • How are warm-blooded animals (endotherms) and cold-blooded animals (ectotherms) similar and different?
  • For an organism, what are the advantages and disadvantages of being an ectotherm or an endotherm?