Population Sampling Flashcards
1
Q
A quadrat is…
A
A square frame enclosing a known area, e.g 1m (squared)
2
Q
To work out the population size you have to…
A
- Work out the mean number of organisms per square metre.
2. Multiply the mean by the total area in square metres of the habitat.
3
Q
Transects are…
A
lines used to help find out how organisms are distributed across an area.
4
Q
A transect is used by…
A
- Marking out a line in the area you want to study.
2. Collecting data along the line at certain intervals, possibly using quadrats.
5
Q
When collecting environmental data, you need to think about…
A
Reliability
Validity
6
Q
To make your results more reliable you need to take a…
A
large sample size.
7
Q
For your results to be valid they must be…
A
reliable
using random samples
assured that variables that could be affecting distribution are controlled.
