Project #801 on iSENSEProject.org
Background:
The topic: “How do you measure things you cannot ever see?”
Procedure:
Equipment: Marbles glued to a board. About 10 more identical marbles.
From 15 feet, roll marbles at the target marbles under the board. Simply count the number of collisions and record.
Analysis:
Use the formula to calculate the radius of the marbles hidden from the number of collisions and the spacing
Name  Units  Type of Data 

Number of collisions

marbles

Number

Number of total tries

marbles

Number

Number of collisions  Number of total tries 