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.