Students also have a limited understanding of sources of energy in marine ecosystems, basing most of their understanding on their experiences of land ecosystems. This is a problem as matter is recycled in an ecosystem but energy is not. Students may see the arrows as referring to a flow of matter (stuff) up a food chain. Students often have trouble interpreting food chains, particularly where the diagram uses arrows to represent energy exchange. Students are strongly influenced in this area of science by the media and their everyday experiences.Ĭonfusion around specific terms is also addressed in the focus idea Most students recognise that almost all organisms need a source of energy to survive, function and reproduce. Students’ everyday use of this term can often cause confusion for students when learning to use the correct scientific term. The word energy is used every day by students in expressions like, ‘I have run out of energy’ or ‘I need some more energy’. Contrasting student and scientific views.
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