Principles of Experimentation

Principles of Experimentation

1. Careful planning and design

   • only one variable
   • all other factors constant

2. Ensuring a safe experiment

   • long hair - tied back
   • wear lab coat
   • wear safety goggles
   • be aware of safety info
   • report all accodents to teacher
   • wash hands regularly
   • avoid contact between water and electrical equipment

3. Design of a control experiment

4. Ensuring a fair experiment

   • sample size
   • random selection
   • others must be able to replicate experiments
   • double blind testing