Food web — Science definition
Defined in 2 courses:
- A model of connected feeding relationships among organisms. (Science 6: Matter, Energy & Earth Systems)
- All the feeding relationships in a place drawn together, with arrows running from the eaten to the eater. (Life Science & Scientific Inquiry)
Where it is taught
- Food Chains, Food Webs & Energy Flow — Ecosystems, Watersheds & Conservation, Science 6: Matter, Energy & Earth Systems, Grade 6
- Energy Flow, Food Chains & Food Webs — Ecosystems, Matter & Energy, Life Science & Scientific Inquiry, Grade 7
In use
Every organism occupies one of these roles in a given relationship, and a food web is the whole set of them in a place, with arrows showing where energy and matter go.
Energy Flow, Food Chains & Food Webs
Questions using food web
Problem 1
Which statement correctly uses food web in Food Chains, Food Webs & Energy Flow?
- food web: A model of connected feeding relationships among organisms.
- Food-web arrows always point from predator toward prey.
- Every feeding transfer has exactly the same universal percentage.
- One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation
food web: A model of connected feeding relationships among organisms.
A model of connected feeding relationships among organisms. The arrows show receiving organisms obtaining matter and energy from resources. 80 ÷ 800 = 10% in the stated biomass-transfer model, not a universal percentage. The second fish provides another feeding route, and the web lacks population sizes and rates; it cannot specify an exact future bird count.