Why Are Blue Whales So Enormous?

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Isn't it strange that Earth's largest animal lives on one of its tiniest? Using Sesame-Street-style puppetry, this video explains how this phenomenon happens. Viewers learn that a single mouthful of krill taken in by a whale has the calorie content of 1,900 hamburgers! The host webpage includes links to multiple-choice questions that can be used as an assessment or discussion guide, as well as links to more information on blue whales and krill. You could use this in a lesson on adaptations or on the food chain in your life science class.

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CCSS: Adaptable
NGSS: Adaptable
Additional Tags


  • Puppets provide a unique video style that holds the interest of viewers
  • Adaptable to Next Generation Science Standards in life science

  • Older learners may find the animation slow; consider this mostly for use with upper-elementary classes