Sampling organisms (Required Practical)

Question 1

what is random sampling

Answer 1

when you use a quadrant that can be various different lengths

Question 2

how do you estimate the total population of daisies in a field

Answer 2

1. put 2 tape measure at a right angle ans should measure 20m in length
2. get 2 bags with each bag containing the numbers 1 to 20
3. work in a group of 3 where person 1 picks a number and for example it is 8 they move to the 8m point of the tap measure
4. repeat this for person 2
5. person 3 will then place the quadrant at 8 to 12
6. the students then count the number or daisies in the quadrate
7. repeat this process 9 times

Question 3

how do you estimate the total number of daises in the whole field

Answer 3

total population size = total area number of organisms
———— x of that specied counted
area sampled in sample

Question 4

how can we use a transect line to see how the number of daisies change from the tree outwards

Answer 4

1. put the tape measure at the tree in a diagonal line
2. use a quadrat to count the number of daisies at the start of the transect
3. record the light intensity by using a light meter or an app
4. move the quadrat 1m down the line and repeat the measurement and do this until you reach the end of the tap measure