biology paper 2 practicals

• What is the initial position of person 1 during the experiment?

  Person 1 sits on a stool with good posture
• How does person 1 position their arm for the reaction time test?

  Forearm across the table with hand over edge
• Where should 0 cm be positioned in relation to person 1's fingers?

  Between thumb and first finger
• What action does person two perform during the experiment?

  Drops a ruler at a random time
• What should person 1 do when the ruler is dropped?

  Catch it based on their reaction timing
• What should be done with the measurements recorded during the experiment?

  Calculate the mean of the reaction times
• What happens after person 1 completes their trials?

  They switch places with person two
• What is the independent variable in this experiment?


  Person having reaction taken
• What is the dependent variable in this experiment?


  Reaction time
• What is the control variable in this experiment?

  Distance between thumb and first finger
• How could caffeine be incorporated into the experiment?

  Use coke to measure timing with caffeine
• How might caffeine affect reaction time in this experiment?

  Caffeine could change reaction time measurements