Required practical - Field investigations (AQA GCSE Biology Combined Science): Flashcards
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Practise the cards
10 cards from this deck
Use of quadrats in field investigations
Use of quadrats in field investigations
Counting populations
Use of transects in field investigations
Use of transects in field investigations
Studying environmental effects on organisms
Minimum quadrats needed for reliable results
Minimum quadrats needed for reliable results
At least 10
Why use random sampling with quadrats
Why use random sampling with quadrats
Gives fair results representing whole area
Area of 0.25m × 0.25m quadrat
Area of 0.25m × 0.25m quadrat
Definition: Positive correlation
Definition: Positive correlation
More organisms as environmental factor increases
Definition: Negative correlation
Definition: Negative correlation
Fewer organisms as environmental factor increases
Examples of environmental factors to study
Examples of environmental factors to study
Light intensity, soil pH, temperature
Basic transect method steps
Basic transect method steps
Lay tape, measure organisms & factors at intervals along line
Why count plants not flowers in quadrats
Why count plants not flowers in quadrats
Plants easier to identify accurately