Lesson Overview

 50 Minutes

 1, 5, 9

 K - 8th Grade

 State Standards:
NGSS: 2-PS1-1, CCSS: RI.5.7, W.2.7, Math; MP.2, MD.5.C.3

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Materials List

Each group will need:

• 1 cup whole milk
• 1 cup half & half
• 1/2 cup sugar
• 1/2 tsp. vanilla
• 1 quart-size plastic bag
• 1 gallon-size plastic bag
• 3/4 cup rock salt
• Crushed ice
*Hand towel, duct tape, measuring
cups and spoons, cups and spoons for
tasting ice cream

Physical Changes of Matter & Ice Cream

Categories: Chemistry , Food & Nutrition , Recipes , Science

This lesson is a delicious way to teach students about one type of physical change that matter can under go - liquids transforming into a solid.

INSTRUCTIONS

  • Divide the class into groups and provide each with ingredients (makes about 3 cups ice cream).
  • Have students measure the first four ingredients and place them in a quart-size plastic bag.
  • Seal the bag and tape over the opening (duct tape works well).
  • Taping shut the quart bag keeps the rock salt from getting into the ice cream.
  • Place the quart bag inside a gallon bag then pack crushed ice around it.
  • Pour at least ¾ cup of rock salt evenly over the ice.
  • Close the gallon bag, removing as much air as possible.
  • Have students hypothesize about what will happen to the liquid mixture once they start shaking it.
  • Wrap a towel around the bag. Have the students take turns shaking the ingredients for 5-10 minutes.
  • Open the outer bag.
  • Remove the inner bag containing the ingredients.

For full instructions, please download our PDF

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