Changing State: Freezing

There are five types of frost: ground frost, air frost, hoar frost, glaze, and rime. Scholars mix ice and salt in a metal container to observe frost forming on the outside of the can. Animations and videos enhance the learning. 

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CCSS: Designed
NGSS: Designed
Instructional Ideas

  • Discuss what would happen if you placed a glass of water in the freezer overnight
Classroom Considerations

  • Activities in the explore section will not work if humidity level is too low
  • Requires the water molecule models made in the first lesson of the series
  • Lesson is the fourth in a series of five
Pros

  • Lesson follows a 5E format
  • Discusses freezing points of other liquids
  • Extension covers how something can turn from a gas into a solid
Cons

  • None