Fieldwork techniques (AQA GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is a quadrat?
What is a quadrat?
A square frame with a known area
Which organisms are quadrats most useful for studying?
Which organisms are quadrats most useful for studying?
Plants & very slow-moving animals
Why must quadrats be placed randomly?
Why must quadrats be placed randomly?
To avoid bias in results
Study area= m², quadrat= m², mean=. What is the population estimate?
Study area= m², quadrat= m², mean=. What is the population estimate?
organisms
How do you calculate the mean number of organisms per quadrat?
How do you calculate the mean number of organisms per quadrat?
Add all counts, divide by no. of quadrats
What is the mode in a data set?
What is the mode in a data set?
The value that appears most often
Data: . What is the median?
Data: . What is the median?
What is a transect?
What is a transect?
A straight line across a study area
How are quadrats placed when using a transect?
How are quadrats placed when using a transect?
At regular intervals along the line
Why are transects used?
Why are transects used?
To study how species distribution changes