Fieldwork techniques (AQA GCSE Biology): Flashcards

Number of organisms in an area

Where organisms are found & how they spread out

Square frame used for sampling organisms

Prevents bias & ensures data represents whole area

Plants & very slow-moving animals like snails

Sum of all values $\div$ number of values

Value that appears most often

Middle value when all values are in order

Line across area with quadrats at regular intervals

At equal distances along the line

Studying how organisms change between habitats

$0.25\text{m}^2$, $0.5\text{m}^2$, or $1\text{m}^2$

To study organisms in natural conditions