It’s A Chilling Experience!

Part Two: Observations and Applying Your Knowledge

On a separate sheet of paper, answer the following questions.

Observations

1. Describe the physical properties of the half and half cream (or milk).
2. Describe the physical properties of the ice cream you made.

Applying Your Knowledge

1. Why do you think salt was added to the ice?
   
   
2. Is ice cream a pure substance or a mixture?
   
   
3. Did a chemical or physical change take place during the preparation of ice cream?
   How do you know?
   
   
4. The chemical formula for the sugar (sucrose) used in this activity is C12H22O11? Is sucrose an element or a compound? Explain your answer.
   
   
5. • What common mineral is found in milk products (like ice cream) that is essential for the growth of strong bones and teeth?
   • Write the chemical symbol of this mineral.
   • Where is this symbol located in the periodic table.
     
     
6. Why is it important to wash your hands and have a clean lab bench?
   
   
7. You want to e-mail this recipe to a friend in the United States. However, in order for your friend to understand the recipe you must first convert the metric measurements into imperial quantities. Rewrite the ingredients for the ice cream recipe into imperial measurements.
   
   
8. You have perfected a technique for making a single serving of vanilla ice cream. Your next step is to increase production size to 150 students. Calculate in metric the quantity of materials required to prepare 150 single servings of ice cream.