## Science Fair Project for Middle School Students: “Slip and Slide”

Yesterday, we posted big news about the 2011 Google Science Fair Competition. In keeping with the Science Fair theme- we choose to highlight one of our many Science Fair Projects featured on Science Fair Sanity.

Science Fair Sanity is a free resource for students, teachers, and science fair coordinators. All of the science fair projects, ideas, and resources are made possible by a generous donation from Chicago School Supply.

In addition, we would like to extend a 20% discount to teachers when you shop for your supplies at Schoodoodle.com.  Simply enter the code: SCIENCE when you check out!

This week, we are highlighting project from Daryl Vriesenga’s book, Science Fair Projects, Grades 4-6, Michigan, Schaffer Publications, 1990.

## Title: “Slip and Slide”

Stating the Problem – The Big Question
There are many factors that can affect the amount of friction between two surfaces. In your experiment, you will be measuring friction and finding out how weight, type of surface, and other factors affect friction. Write a question that asks what you want to learn about friction from your scientific investigation.

Forming a Hypothesis – A Smart Guess
Do you think friction is affected by an object’s weight? By the object’s size? The type of surface? In one sentence write a hypothesis, or a prediction of what you will find out. It should answer your Big Question.

Planning the Procedure
What is friction? How is friction measured? How is friction helpful to man? When is friction harmful? These and many other questions can be answered by doing some research in your library. Before a scientist plans the procedure for a scientific investigation, he or she finds out what others have learned about the topic. Read some books and articles about friction.

The experiment can be constructed easily with materials found around the house or bought at a local hardware store. Washers are being used to measure the force of friction. How many washers does it take to move the block? What would happen if you taped different kinds of materials on the bottom of the block, such as waxed paper or sandpaper? What would happen if you used a lubricant, such as oil or petroleum jelly,
between the block and the sliding surface?

Write a step-by-step description of your experiment. Make a detailed list of materials that will be needed.

Make a chart or table to record the results of your experiment. See the download (at the bottom of the post) for a sample of a chart you might use.

Recording Results
Push, Pull! Slip! Slide! It’s time to begin measuring the force of friction on various kinds of objects. Remember to keep careful and accurate records of your experiment. Carefully record the results on charts that you have prepared. To compare the results, you can use bar or line graphs.

Drawing a Conclusion
What have you learned about friction from your experiment? How accurate was your prediction? Write a report that describes what you learned from your investigation of friction. Your report should include the steps of the scientific method: