Physical Changes of Matter & Ice Cream

Categories: 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