S3.2.3 For the adult
Food webs
What happens to the rabbits if all the foxes go away?
What this chapter teaches
Real food chains cross, because most animals eat more than one thing. A food web shows this. Removing one animal changes the numbers of others, often both up and down.
Three questions to ask
There is no one right wording. Listen for the idea.
- What does an arrow in a food web mean?
- If the foxes went away, who would gain and who would lose?
- Why do the rabbits fall after they rise?
After the chapter, the learner can
- Join food chains into a food web
- Predict what happens to a food web if one animal disappears
What they copy into their notebook
A food web is food chains joined together. Arrows point to the eater. Take one living thing away and the others change. A population is all the animals of one kind in a place.