6 markers required practicals

Question 1

Reaction time

Answer 1

-hold ruler between someone’s index finger and thumb, lined up at the 0cm mark

-drop ruler without warning, record distance dropped befoer caught

-reaction time can then be calculated through newtons equation of motion

-carry out repeats, however identify that the person being tested will get better over time

-add an independant varaibel, e.g. a stimulant, for example coffee or an energy drink, to see if it improves reaction time

Question 2

Quadrats

Answer 2

-use a random number generator to choose grid positons in the area being tested.

-place 1m squared quadrat over

-ideally sample 10% of whole area, to give an accuate estimate

-calculate the mean number per m squared, then multiply by the total area to give an estimate of the total population

-combine quadrat with a transect , record number per m squaured

-can have abiotic and biotic factors involved