Investigating ecosystems (Edexcel GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is a quadrat?
What is a quadrat?
Square frame enclosing a known area
Why should you use a random number generator when placing quadrats?
Why should you use a random number generator when placing quadrats?
Ensures results represent whole area
To calculate mean organisms per quadrat, what do you divide total organisms by?
To calculate mean organisms per quadrat, what do you divide total organisms by?
Number of quadrats used
A quadrat has mean of 10 organisms. How many organisms per ?
A quadrat has mean of 10 organisms. How many organisms per ?
20
Mean is 20 daisies per . Field is . Estimate total daisy population.
Mean is 20 daisies per . Field is . Estimate total daisy population.
16,000
What is a gradient in ecology?
What is a gradient in ecology?
Change in abiotic factor across habitat
What is a belt transect?
What is a belt transect?
Quadrats laid along a line
In long transects, how can quadrats be placed?
In long transects, how can quadrats be placed?
At regular intervals
What are two ways to collect data in quadrats?
What are two ways to collect data in quadrats?
Count organisms or estimate % cover
Why plot graphs in transect studies?
Why plot graphs in transect studies?
See if factors correlate with distribution
Which equipment measures light intensity?
Which equipment measures light intensity?
Light meter
Which are examples of abiotic factors that can be measured?
Which are examples of abiotic factors that can be measured?
Light intensity, soil pH, soil moisture