feezing+of+liquids

Freezing of density

Problem Scenario
A problem for my question could be you need to freeze something fast you know how long it'll take to freeze for the density.

Specific Question
Does the density of liquids affect the freezing time?

Hypothesis
If the liquid is thicker the longer it will take the liquid to freeze. The thinner the liquid is the faster the liquid will freeze.

Independent Variable:
Density of liquid

Dependent Variable:
Freezing time

Variables That Need To Be Controlled:
Temperature of freezer Amount of liquid

General Plan
During this experiment see how the density of liquids affect freezing time. This experiment will take place at school .During the experiment there will be the measuring of liquids, finding out the freezing time, and the density of the liquids. With the experiment there are no environmental issues.

Potential Problems And Solutions
Someone bumping into the container and moving all of my liquids. Solution To have only certain people come near my project.

Safety Or Environmental Concerns
none

What is your experimental unit?
The liquids that are being frozen.

Number Of Trials:
once for each liquid.

Number Of Subjects In Each trial:
One liquid per a trial.

Number of Observations:
When something I see change I will write it down and take note.

When data will be collected
Tuseday, February 26,2013

Where will data be collected?:
At school

Resources and Budget Table
Graduated cylinder || 1 1 || school school || 0 0 ||
 * Item || Number needed || Where I will get this || Cost ||
 * Tomato sauce || 1 can || Walmart || $1.25 ||
 * liquid soap || 1 small bottle || Home || 0 ||
 * Water || 1 cup || school || 0 ||
 * Olive oil || 1 small bottle || Walmart || $3.00 ||
 * Rubbing Alcohol || 1 bottle || Walmart || $1.00 ||
 * Dry Ice? ||  || school || 0 ||
 * Temperature probe || 1 || school || 0 ||
 * computer
 * computer

Detailed Procedure
Step 1:Make sure you have all of your materials. Step 2: Pour 10 milliliters into a graduated cylinder(make sure every liquid is 10 ml). Step 3:Pour one liquid into their own space in the ice cube tray. Step 4:Plug the temperature probe into the computer. Step 5:Place the temperature prob into the liquid. Then press collect data. Step 6:Watch the liquids for any changes. When you see a flat place on your graph you know that's when it's frozen Step 7: repeat steps two through seven. Step 8: Once all of your data is collected and you figured out the exact second the liquid froze make a bar graph that represents the data.

Photo List
**Time Line**

Results
My first graph shows how the affect of freezing time to the density of the the liquid. The second graph shows the density to the liquid. My third graph shows the time of freezing to the liquid.

Conclusion
"Does the density of a liquid affect its freezing time?" Yes, the thicker the liquid was the slower it froze.Then the thinner the liquid was it was faster to freeze. Also the thicker the density was the colder the freezing point was. Therefore the thinner the liquid was the higher the liquids freezing point was.

Discussion
My experiment has the benefit to the community because the density of liquids or the freezing time doesn't really matter to everyone in the world. The experiment went as planned. I was able to find the answer to my question. My independent and dependent variables went together well because after i found all the density to liquids then I froze them then I took note how long it took to freeze. My experiment could be made better by taking more data than I did to make sure the density does affect the freezing time.

**Background Research** The density of the liquids I picked was tomato sauce 1.33 g/ml,water 1.0 g/ml, liquid soap 1.06 g/ml, olive oil 0.93 g/ml. Some people think liquids freeze faster than other but it really depends on the temperature the liquids it freezes at. Also the type/ brand takes place because each company uses different ingredients. Rubbing alcohol is made out of 68% of alcohol 32% of water. Dry ice is made out of frozen carbon dioxide Dry ice turns into a gas as soon as it hits a liquid.

**References**

Do Thick or Thin Liquids Freeze Faster?" //WikiAnswers //. Answers, n.d. Web. 15 Mar. 2013.

Abstract
My science fair question is" Does the density of a liquid affect the the freeing time?" My hypothesis was that the thicker liquids would freeze slower than thinner liquids.The process was we put dry ice into a beaker and added rubbing alcohol. Then I put the liquid into the dry ice mixture and watch it freeze. My results were the thicker the liquid was the lower the temperature needed to be. My conclusion is that the density does affect the freezing time.