icecream science

7/30/2019 Icecream Science

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Ice Cream Science

Grades: K-4

Curriculum Connections: Science

Standards Connections: National Academies of Science, National Science

Education Standards

Content Standard B: Physical Science-Chemical reactions and interactionsof energy and matter

Content Standard E: Science and Technology-Abilities of technologicaldesign

Required Software: Microsoft PowerPoint version 2002, the Office XP

presentation solution; Microsoft Internet Explorer 5/5.5

What's in this Lesson:

Teacher Guide (including How to Begin)

Resources

Student Activity, Step-by-Step:

o Step A: Mix Up Some Ice Cream

o Step B: Dig In for More

o Step C: Dish Out Your Scoop

Teacher Guide

Summary: In the depths of winter, it helps to be reminded that cold can be good.

What better reminder is there than ice cream? In this project, students have fun

learning how ice cream is made, and master important science concepts in the

process.

Objectives:

To understand the basic physical and chemical reactions involved in makingice cream.

To explore related examples of "ice energy."

To present findings and observations in a clear and logical way.

Prerequisite Skills:

Research skills using Microsoft Internet Explorer

Introduction to Microsoft PowerPoint

Sequencing skills


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Time Allotted:

Two to three class periods

How to Begin:

1. The first activity in the project is hands-on ice cream making, which yourstudents will do in pairs. Review Step A of the Student Activity pages, andthen gather the needed materials and resources to bring to class. You willneed:

a. Measuring cups and spoons

b. Enough milk, cream, or half-and-half to provide 2 ounces for each pairof students

c. A bottle of vanilla extract and a bottle of chocolate syrup

d. Sugar (enough for 1 teaspoon per pair of students)

e. Several bags of ice

f. Salt (5-10 ounces for each student pair; you'll assign different saltamounts to different teams)

g. Sandwich-size and freezer-size zip-seal plastic baggies, one of eachfor each student team

h. Newspaper, small towels, or garbage bags to wrap around thebaggies to aid in "churning" by the student pairs

2. Before launching the lesson, use Internet Explorer to check out the TeacherLinks listed under Resources-which provide useful science background-andto preview the Student Links. Bookmark the sites you like best by selectingAdd to Favorites from the Favorites menu.

3. Under Resources, you will find three Microsoft PowerPoint templates for yourstudents to use in pulling together and presenting their ice cream findings.Download all three templates to a location that is easily accessible to yourstudents, such as the shared drive of your classroom network or a floppy diskthat students can pass around.

4. Because your students will be working in pairs for this project, decide inadvance whether you will assign partners or let them choose their own.

5. Before your students begin making ice cream in Step A, you'll want to set upa grid on the board to record the names in each group, the amount of salteach group uses, and the amount of time it takes each group's ice cream tofreeze.

6. If possible, use a digital camera to capture pictures of your students duringthe ice cream making. Students can integrate those pictures into their work inSteps B and C.

7. Copy and distribute the Student Activity pages, and get ready for some coolscience!


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RESOURCES

Teacher Links:

Finding Science in Ice Creamhttp://www.foodsci.uoguelph.ca/dairyedu/findsci.htmlA sophisticated look at ice cream making.

Student Links:

CyberConeshttp://www.cybercones.com/

Just for fun: Scoop an online treat!

Microsoft Office XP Tools to Download for This Project

Microsoft PowerPoint Version 2002

STUDENT ACTIVITY

Description: For this project, you get to make ice cream, dig into the whys and hows

of ice cream science, and present all you've learned to your class. How cool is that?

Step A

Mix Up Some Ice Cream

Software: None
http://www.foodsci.uoguelph.ca/dairyedu/findsci.htmlhttp://www.foodsci.uoguelph.ca/dairyedu/findsci.htmlhttp://www.cybercones.com/http://www.cybercones.com/http://www.cybercones.com/http://www.foodsci.uoguelph.ca/dairyedu/findsci.html


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What to Do: Pair up with a classmate to make ice cream right there in your

classroom.

1. Your teacher will give you two plastic baggies, one large and one small.

2. With your partner, add the following ingredients to the small bag:

a. 2 ounces of milk, cream, or half-and-half

b. 1 teaspoon of sugar

c. A dash of vanilla extract or 1/2 teaspoon of chocolate syrup

3. Seal the bag and take turns squishing and shaking it to mix things up.

4. Now fill your large plastic bag half full of ice, and add the amount of salt thatyour teacher tells you to add. (Different teams will use different amounts of

salt. Your teacher will record this on the board.)

5. Make sure your small bag is still completely sealed, and put it into the largebag with the ice and salt. Seal the large bag.

6. Wrap your large plastic bag in newspaper, towel, or whatever your teachersupplies. Figure out the best way to shake and churn the bag (rememberteamwork!).

7. Guess how long it will take for your ice cream mixture to freeze. Your teacherwill record your guess on the board.

8. Wait for your teacher's signal, and then begin shaking and churning. Keep upa fast pace!

9. Check every couple of minutes to see whether your ice cream is frozen yet.When it is, call out "Ice cream!" Your teacher will record the time on theboard.

10. Take your small bag of ice cream out of the big bag, dispose of the big bagaccording to your teacher's instructions, and settle down with your partner toeat your ice cream.

11. While you're enjoying your ice cream, look at the information on the board

from the other teams. Which teams' ice cream froze fastest? Slowest? Why?Your teacher will lead a discussion about ice and salt and how they worktogether to freeze.

Step B

Dig In for More

Software: Microsoft PowerPoint version 2002, Microsoft Internet Explorer 5/5.5

What to Do: Now you and your partner will research the science of ice cream.


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1. With your partner, choose one of the PowerPoint templates that your teacherhas set up for you. Open the template, click Save as on the File menu, andsave it under your names. Then keep the PowerPoint presentation open orprint it so that you can use it to record the questions and answers that follow.

2. With your partner, think of five questions that you most want to answer abouthow ice cream becomes ice cream. Type your questions on the What WeWant to Know slide of your PowerPoint presentation. Here are somesuggestions to get you started:

a. How was ice cream first invented?

b. What happened when we added salt to the ice? What difference didthe amount of salt make?

c. In what other ways do we use salt for controlling "ice energy"?

d. How does an ice cream machine work? An ice cream factory? Howare those similar to and different from the ice cream making we justdid in class?

e. Can ice cream be freeze-dried? Fried? How?

3. Use your classroom computer and Internet Explorer to search the Internet foranswers to your questions. Your teacher has chosen some Favorites to startwith, but you may want to dig even deeper.

4. As you find answers, type them or paste them into your What We Found Outslides, which are numbered to match each of your five questions. (If you needmore room for an answer to a question, select that What We Found Out slideand select Duplicate Slide from the Insert menu. Be sure to change thenumber in the title of the new slide.)

5. Once your question-and-answer research is complete, think back to your

team's ice-cream-making experience. Use the Make Ice Cream slides to writevery clear, step-by-step instructions for making ice cream. (If you need moreMake Ice Cream slides, select one, and then select Duplicate Slide from the


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Insert menu. Once again, be sure to change the number in the title of thenew slide.)

Step C

Dish Out Your Scoop

Software: Microsoft PowerPoint version 2002

What to Do: Now it's time for you and your partner to fine-tune your PowerPoint

presentation so that you can share it with the class.

1. Go to your What We Want to Know slide, and proofread your questions. Editas necessary for clarity.

2. Next, go through your What We Found Out slides, and make sure you have agood answer for each question. Edit the text to present the informationclearly, briefly, and in your own words. Cite your source for each fact.

3. Look over your Make Ice Cream step-by-step slides to be sure they are clear.

4. Finally, go back to the very first slide, and give your presentation a title. Addyour names, as well.

5. Save your work.

6. Your teacher will arrange a time for you to present your "cool" ice creamfindings-and to see what your classmates have discovered as well!

icecream science

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