Journal of research in science teaching
By Griffiths, Alan, & Grant, Beette
“High school students’ understanding of food webs:Identification of a learning hierarchy and related misconceptions”
Publisher: Wiley online library
Journal of Research in Science Teaching
Pp. 421-436
1985
High school students’ understanding of food webs:Identification of a learning hierarchy and related misconceptions
Type: Empirical
Data collection method: Test
Number of subjects, range: Large — 31 or more
Grade and age of subjects: 9th-12 grade — under 17-18 years
- In a food web, a change in one population will only affect another population if they are directly related to predator and prey.
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A population located higher on a given food chain within a food web is a predator of all populations located below it in the chain.
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A change in the size of a prey population has no effect on its predator population.
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If the size of one population in a food web is altered, other populations in the web will be altered in the same way