PRACTIAL: RULE DROP TEST

Question 1

What is this practical investigating?

Answer 1

the human reaction time

Question 2

What is the reaction time?

Answer 2

the time it takes to respond to a stimulus

Question 3

STEP 1:

Answer 3

• person A should sit with their arm resting on the edge of a table
• to avoid them moving their arm up or down

Question 4

STEP 2:

Answer 4

• person A holds out their hand with a gap between thumb & first finger
• person B holds the ruler ,vertically, with the zero at the top of person A’s thumb

Question 5

STEP 3:

Answer 5

• person B drops it without warning & person A must catch it as fast as possible
• number level at the top of person A’s thumb is recorded in a table
• repeat test serval times the calculates the mean distance that the ruler fell

Question 6

STEP 4:

Answer 6

• person A then has a caffeinated drink ( 300ml cola)

- after 10 mins and repeats steps 1-3

Question 7

List any controlled variable that made it a fair test

Answer 7

• same person to catch the ruler
• same hand to catch the ruler
• same height the ruler was dropped at
• the person catching the ruler shouldn’t have had caffeine before the practical

Question 8

Why do students complete the ruler drop test after drinking water, before going on the complete it again after drinking caffeine?

Answer 8

• water is a control

- so we use it to compare results before and after caffine

Question 9

What is the link between the mass of caffeine consumed and the reaction time?

Answer 9

• the increase mass of caffeiene
• means a decrease the reaction time
• as the ROR is faster