Shaky Ice Cream

Baylor GroupMs. Tamez

2008-2009

Our Science Project Category

Physical: Our project is related to the physical sciences such as physics, chemistry and astronomy since it deals primarily with non-living materials.

Science Project Research The freezing point or melting point of water is the

temperature at which water changes phase from a liquid to a solid or vice versa. The freezing point describes the liquid to solid transition while the melting point is the temperature at which water goes from a solid (ice) to liquid water. In theory, the two temperatures would be the same, but liquids can be super cooled beyond their freezing points so that they don't solidify until well below freezing point. Ordinarily the freezing point of water is 0° C.

Science Project Research Boiling point is defined as the temperature when the vapor pressure of the

substance or liquid is similar to the external pressure or atmospheric pressure surrounding the solution. A further increase in temperature from this Boiling point is taken up by the liquid as latent heat of vaporization, which helps in changing the liquid to gaseous state. This way, water heated at a temperature higher than Boiling point is evaporated as steam.

Water Boiling point in Celsius - The Boiling point of water is 100 degrees Celsius at 1 atmosphere. The bubbles formed on the sides of vessel at the time of heating water are nothing but the air trapped in water

Question

“Does Salt Affect the Freezing Point of Sweet Milk?”

Project Overview Controlled variables: These are the things that are kept the same

throughout our investigation Independent variable: The one variable that we purposely

change and test. Dependent variable: The measure of change observed because

of the independent variable. It is important to decide how we are going to measure the change.

“Does Salt Affect the Freezing Point of Sweet Milk?”

Variables

Dep.Ind. Cont.

If we measure the time of the freezingpoint of sweet milk with two differenttype of salts, then table salt willaccelerate the freezing point of sweetmilk.

Hypothesis

10ml sugar 500 ml milk 5 ml vanilla extract 250 gr. table salt 250 gr. Kosher salt Ice cubes (enough to fill each gallon-size bag about half

full) 1L Ziploc bag 3L Ziploc bag

Materials

1. Combine the sugar, milk, and vanilla extract in the pint-size bag and seal it tightly.

2. Place the table salt and ice in the gallon-size bag, then place the sealed smaller bag inside as well. Seal the larger bag. Now shake the bags until the mixture hardens.

3. Feel the small bag to determine when it's done.

4. Record the Time

5. Take the smaller bag out of the larger one, add mix-ins, and eat the ice cream right out of the bag.

6. Repeat steps 1-3 two more times

7. Repeat the procedures but change the table salt for Kosher salt

Procedure

Analyzing the ResultsData and Observations

Trials Table Salt Kosher Salt

1 7 min 5 min

2 8 min 4 min

3 8 min 5 min

4 8 min 5 min

Average 8 min 5 min

Analyzing the ResultsData and Observations

T1 T2 T3 T40

1

2

3

4

5

6

7

8

SHAKY ICE CREAM

Table Salt

Kosher Salt

The Kosher Salt accelerated the process of freezing point of the sweet salt as observed in our data.

Conclusion

Project OverviewWriting the Summary

“Our hypothesis was incorrect since the Kosher salt accelerated the freezing point of sweet milk.”

DiscoverySchool.comhttp://school.discovery.com/sciencefaircentral/

Discovery Channel’s guide to projects. Includes project ideas, questions & answers, tip sheets, and a “Parents-Get Involved” section. All Science Fair Projectshttp://www.all-science-fair-projects.com/

Browse ideas by topic or grade level. You can also search if you know your topic. Be sure to look at the grade level of the project.Charts and Graphshttp://www.twingroves.district96.k12.il.us/ScienceInternet/ChartsGraphs.htmlTwin Groves Middle School in Buffalo Grove, Illinois has a great website that discusses different graphs that can be used to display data.

http://nces.ed.gov/ncekids/graphing

http://galenet.galegroup.com/servlet/SciRC?locID=fl_breva&bi=SU&bt=%2522Science+experiments%2522&ste=10&st=b

References

Charts and Graphshttp://www.twingroves.district96.k12.il.us/ScienceInternet/ChartsGraphs.htmlTwin Groves Middle School in Buffalo Grove, Illinois has a great website that discusses different graphs that can be used to display data.

http://nces.ed.gov/ncekids/graphing

http://galenet.galegroup.com/servlet/SciRC?locID=fl_breva&bi=SU&bt=%2522Science+experiments%2522&ste=10&st=b

References