Practicals

Question 1

Apparatus for reaction time?

Answer 1

Chair
Table
Partner
A metre ruler

Question 2

Risk assessment for reaction time?

Answer 2

Be careful from injuries due to the falling ruler.

Question 3

Reaction time practical? (9)

Answer 3

1. Out of the partners, person A sits on a chair with their forearm resting on a table with their hand hanging over the edge.
2. Person B should then stand holding a metre ruler directly above the hand of person A. The 0cm measurement should fit between their thumb and forefinger.
3. Person B should have a stopwatch to time the reaction where at a random point they start the timer and drop the ruler simultaneously stopping the timer immediately once person A catches the ruler.
4. Repeat the experiment 10 times, ensuring you record the time and distance that the ruler is caught at.
5. Allow person A and person B to switch places. Repeat experiment to record the results of person B.
6. Person A should then drink a caffeinated drink, wait a few minutes and then repeat the experiment with person B dropping the ruler.
7. Person B can repeat the experiment after having a caffeinated drink, ensuring the new records are written down.
8. Create a table to convert ruler measurements and reaction times to have a mean value. 9.Compare the mean reactions before and after having caffeine to determine its effects.

Question 4

Purpose for reaction time practical?

Answer 4

To determine whether your reaction time can be reduced with practice.

Question 5

Apparatus for Field Investigations?

Answer 5

0.5m^2 quadrat
30m tape measure
clipboard
pen
paper

Question 6

Purpose for Field Investigations?

Answer 6

To measure the species richness on the school field in areas in which the grass is regularly and irregularly cut.

Question 7

Risk Assessment for Field Investigations?

Answer 7

• If grass is wet don’t do the experiment as you may slip
• Areas should be checked prior to the experiment to check for hazardous equipment

Question 8

Practical for Field Investigations using Sampling? (6)

Answer 8

1. Choose a starting point on the field where the grass is often cut.
2. Use random numbers to generate a set of coordinates to place your first quadrat.
3. Count the number of different plant species within this quadrat.
4. Return to your starting position and repeat steps 2 and 3 14 times using different random numbers.
5. Repeat steps 1-4 in places where the grass is infrequently cut.
6. Calculate a mean for each location.

Question 9

Practical for Field Investigations using a Transect Line? (5)

Answer 9

1. Place a tape measure at the tree.
2. Use a quadrat to measure the number of daisies at the start of the transect.
3. Record light intensity using a light meter.
4. Move the quadrat 1m down the tape measure and repeat the measurements.
5. Repeat it all the way down the tape measure.