What's covered
Ecosystems and food webs10
Sample questions
A taste of the 10 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
1Ecosystems and food webs
What is an ecosystem?
- •A single species in a habitat area
- ✓Community of organisms with their environment
- •Only the predator-prey pairs in habitat
- •Only the producers in a local area
2Ecosystems and food webs
What does an arrow in a food chain show?
- ✓Direction energy flows
- •Predator pointing at prey
- •Reproduction direction
- •Who lives where
3Ecosystems and food webs
Why does energy decrease up a food chain?
- •Energy is destroyed in cells
- ✓Lost as heat, waste, and movement
- •Predators are smaller than prey
- •Producers store all their energy
4Ecosystems and food webs
What is a habitat?
- •The group of all herbivores
- ✓The place where an organism lives
- •The smallest unit of life
- •The total energy in the food chain
5Ecosystems and food webs
Which sampling method counts plants in a fixed area?
- •Insect pooter
- •Pitfall trap
- ✓Quadrat sampling
- •Sweep net catch
6Ecosystems and food webs
Removing one species from a food web can affect many others.
Answer: true
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