Paper 2 RPAs Flashcards
1
Q
Describe the method of the reaction time RPA.
A
- Person A holds out their hand with a gap between their thumb and first finger.
- Person B holds the ruler with the zero at the top of person A’s thumb
- Person B drops the ruler without telling Person A and they must catch it.
- The number level with the top of person A’s thumb is recorded in a suitable table. Repeat this ten times.
- Swap places, and record another ten attempts.
- You can use the conversion table to help convert your ruler measurements into reaction time or just record the catch distance in cm
2
Q
Name the independent variable.
A
- The person having their reaction time tested.
3
Q
Name the dependent variable.
A
The reaction time.
4
Q
Name 3 control variables.
A
- The environment.
- The distance between the thumb and forefinger.
5
Q
How would we investigate the effect of caffeine on a persons reaction time?
A
6
Q
How would we investigate the effect of practise on a persons reaction time?
A
7
Q
How would we investigate the affect a persons hand (dominant / non dominant) has on reaction time?
A
8
Q
Name 4 factors affecting reaction time.
A
Tiredness, Distractions, Alcohol, Age.
9
Q
What’re the two different types of sampling?
A
Quadrat and transect
10
Q
Plan an investigation to measure the species richness on the school field in which the grass is regularly and irregularly cut.
A
- choose a starting point on the school field in an area where the grass is often cut
- Use a random number generator to generate a set of coordinates to place your first quadrat.
- Count the number of different plant species within this quadrat.
- return to your starting position and repeat steps two and three a another 10 times using different random numbers.
- repeat steps one to four for a part of the school field which the grass is infrequently cut.
- compare your results by calculating a mean for each location.
11
Q
A
