Post on 29-Mar-2015
Science Fair ProjectSalt & water
Chemistry
Frances Hansen and Maribel Cerda
Statement of the Problem
How does salt affect the temperature of cold water?
Project Overview
We put 1/8 teaspoon of salt into six cups of cold water and left 6 cups of cold water without salt.
Research
EasyTook time
A lot of planningTook effort
Variables
Independent variable: Our independent variable would be the salt Dependent variable: Our dependent variable would be the
temperature of water. Constant variables: Our constant variables are the types of cups
we use, the type of thermometer, and the brand of salt we use. Control group: Our control group is the cup of water without salt
We selected this our control group because it will help us identify the differences in the temperatures.
Hypothesis
If 1 gram of salt is put into a cup of cold water , then the temperature of water will become colder because of
all the substances salt contains. Our hypothesis is a trend because it
will make anonymous results
Materials
12 cups A cup of salt Liter of water Thermometer Measuring cups
Procedure
Layout supplies Label each cups (s for salt on 6 cups and ns for no salt on
the other 6 cups) Fill each cup with ½ cups of water Put 1/8 teaspoon of salt into the cups labeled s Place the thermometer in the water Read the temperature Tell whether the temperatures changed Record the data on the chart Repeat steps 4-8 with the remaining cups
Photos
Data/Observations (Analyzes)
cup 1 cup 2 cup 3 cup 4 cup 5 cup 60%
20%
40%
60%
80%
100%
120%
salt no salt
Key:100% will mean it stayed the sameAny other percents means it got colderNumbers are accurate
Conclusion
Our experiment proved our hypothesis correct because the cups with salt in them got colder. Overall, this
experiment was very educational.
Possible Experimental Errors
The thermometer could have not been accurate
We could have read the thermometer wrong
It was possible that we skipped a step
Applications and Recommendations
We recommend that you spend and make time when
doing experiments.Especially ones that take
time
Works Cited
Cerda, Maribel, and Frances Hansen. Science Research Paper. 28 Jan. 2011.
Salt and Water. Home, Phoenix.