Printable worksheet ยท 3 of 4
A change can spread through a web - Paper 3
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Supplied simplified food web: leaf -> snail -> thrush; worm -> thrush. Every arrow points FROM food TO consumer; it represents a route for matter and energy transfer. Proposed change: snail numbers fall. Predict an initial effect with other relevant conditions similar, then state a reason not to treat it as certain.
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