House vs. Pins By: Rachel Carroll

Problem  How do regular household liquids (bleach,salt water, regular water, laundry detergent, dishwasher detergent, and Coke) effect the appearance of the safety pins?

Overview  I wanted to see what happened when I put safety pins in commonly used household liquids. I thought that they would become rusty or dissolve.

Research  Books  Websites

Variables  Independent Variable: The safety pins that were put in the bleach and Detergents  Dependent Variable: How rusty the pins are  Constant Variable: The pins that weren’t out into any liquids  Control Group:

Hypothesis  The liquids (like bleach and detergents) that are used for cleaning are going to have more rust on them.

Materials  Containers 100 mL of each liquid  Bleach 200 mL containers  Laundry Detergent  Dishwasher Detergent  Salt  Water  Measuring cup  Spoon (Mix Stuff)

Procedure 1. Measure each liquid (100 mL) 2. Pour each liquid in container 3. Stir every hour 4. Keep in container for 4 days 5. Take pins out 6. Observe what happened over the 4 days

Table

Conclusion  My hypothesis was true because the cleaning liquids either were rusty or had dissolved the safety pins. I learned that safety pins are very sensitive to any type of liquid, mostly cleaning supplies and soft drinks.

Errors  Water didn’t do anything  Smelled like feet  Bleach was out of control  Dishwasher detergent dried up causing lack of rust

Recommendations  Should have nails instead of bobby pins  More liquids (soft drinks and Oxi Clean)  Leave in for 1 week

Works Cited  Works Cited  Barnes, Linda. Hardware. New York: Delacorte, Print.Finishing.com - "The Home Page of the Finishing Industry" ｮ. Web. 9 May ."Home Decorating and Interior Design Ideas - BHG.com." Better Homes and Gardens - Home  Decorating and Remodeling Ideas, Gardening, Recipes, and More. Web. 12 May ."Nail Expirement." Science Fair Project Ideas, Answers, & Tools. Web. 12 Apr