Answers for Variables Worksheet

 For each experiment below specify the independent, dependent, and controlled variables. 

  1. Two groups of students were tested to compare their speed working math problems.  Each group was given the same problems.  One group used calculators and the other group computed without calculators.
  1. Students of different ages were given the same puzzle to assemble.  The puzzle assembly time was measured.
  1. A study was done to find if different tire treads affected the breaking distance of a car.
  1. A study was done with an electromagnet system made from a battery and wire wrapped around a nail.  Different sizes of nails were used and the number of paper clips that the electromagnet could pick up was measured.