Science · Grades 5–8
Food webs and ecosystem reasoning · revision card
In these exercises an arrow points from a food source to the organism that eats it.
Keep these ideas clear
Read the arrow
In these exercises an arrow points from a food source to the organism that eats it.
Expect connected effects
Changing one population can affect several others, but a food web alone does not predict exact numbers.
Two useful examples
In grass → rabbit → fox, which organism is the producer?
grass
grass
In grass → rabbit → fox, what does the first arrow represent?
food or energy transfer from grass to rabbit
food or energy transfer from grass to rabbit
Explain it without looking
- Explain why decomposers matter even though they are often left out of simple food chains.
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.