Lesson Plan

Freezing Point Depression: Why Don’t Oceans Freeze?

Curated and Reviewed by Lesson Planet

Can you go ice fishing in the ocean? Learners examine the freezing point of different saltwater solutions. Each solution has a different concentration of salt. By comparing the freezing points graphically, they make conclusions about concentrations.

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Teach key vocabulary before beginning the lab activity
  • Have pupils predict the freezing point of each sample of solute prior to completing the investigation
Classroom Considerations
  • Requires specific laboratory materials and time for set up
Pros
  • Includes an advanced version of the lab investigation
  • Provides reflection questions
Cons
  • Reference video is unavailable to view