# Static electricity investigation

**This task is about critiqing the method used in an investigation.**

Sandra did an experiment with static electricity. She ran a comb through her hair ten times and then held it over a pile of small pieces of paper.

She counted the number of pieces the comb picked up. She repeated the experiment three times.

Her results were:

Trial |
Number of pieces of paper picked up |

1 | 3 |

2 | 7 |

3 | 5 |