Materials List: How Cold Can You Go?

Photo shows two transparent ice cubes.
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Each group needs:

In addition, prepare the following supplies for the three different group types:

  • give the "no salt" groups nothing extra
  • give the "some salt" groups each a plastic baggie containing one-quarter cup salt
  • give the "lots of salt" groups each a plastic baggie containing 1.5 cup salt (or more)

To make the ice-cream mix (makes 17 single-bag [¼ cup] servings):

  • 2 cups half & half
  • 2 cups heavy cream
  • ¼ cup powdered sugar
  • 1 teaspoon vanilla extract

To share with the entire class:

  • classroom board or overhead projector


Note: This activity can also be conducted with the older (and no longer sold) LEGO MINDSTORMS NXT set instead of EV3; see below for those supplies:

  • a thermometer OR a LEGO MINDSTORMS NXT Intelligent Brick with an attached LEGO NXT Temperature Sensor
  • computer loaded with the NXT 2.1 software