Aug 162013

Wood frog

How do frogs survive the winter when they’re frozen solid? Their heart may even cease to be beating, and yet they still bounce back just in time for some springtime hanky-panky. You will complete three short lab experiments to explore topics that help explain how frogs freeze over the winter: solute concentration, osmosis, and freezing point depression.

At the conclusion of the lesson, students will be able to:

  • Define and explain osmosis
  • Predict the relative freezing points of pure water, salt water, and sugar water
  • Understand that frogs have adaptations that help them survive the winter


Lesson Plan created by GK-12 Fellows Emily Grman and Sara Parr Syswerda, 2008