4.2

4.2- recall the use of quadrats to estimate the population size of an organism in two different areas

a quadrat- method of sampling
quadrat size range between 0.25x0.25m to 1x1m
quadrat is a square grid
quadrats can be made of wood, metal, string or plastic
it helps compare the population in two different places.
you place the quadrat down and count the number of organisms within the grid and you do this sevral times and average it in each area