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Food webs and interdependence

6th grade (Year 7 in England) · 16 questions · Common Core: NGSS.MS-LS2-1, NGSS.MS-LS2-2, NGSS.MS-LS2-4 · England: KS3 Biology: Interactions and interdependencies, KS4 Combined Science: Ecosystems

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Score/ 16

1
Question 1
Food webs: which statement is NOT true?
- A. Animals often compete for food, water and space.
- B. Plants compete for light, water and minerals.
- C. Predator and prey populations often rise and fall in cycles.
- D. A food web contains only one food chain.
2
Question 2
What does "interdependence" mean in an ecosystem?
- A. Only predators matter
- B. Living things depend on each other, so a change to one affects others
- C. Every animal lives alone
- D. Plants do not need animals at all
3
Question 3
Woodland food web: grass is eaten by rabbits and mice. Seeds are eaten by mice. Rabbits are eaten by foxes. Mice are eaten by foxes and owls. If disease killed most rabbits, what might happen to the mice?
- A. They increase, because foxes stop eating
- B. They stop eating seeds
- C. They become rabbits
- D. Their numbers fall, because foxes eat more mice
4
Question 4
Food webs: which statement is NOT true?
- A. Plants do not compete with each other.
- B. Plants compete for light, water and minerals.
- C. Predator and prey populations often rise and fall in cycles.
- D. Animals often compete for food, water and space.
5
Question 5
Why is a food web more realistic than a single food chain?
- A. Food webs have no producers
- B. Animals only ever eat one food
- C. Most animals eat, and are eaten by, more than one kind of living thing
- D. Food webs only show plants
6
Question 6
Pond food web: algae are eaten by tadpoles and water fleas. Tadpoles and water fleas are eaten by small fish. Small fish are eaten by herons. If the small fish died, what would happen to the herons?
- A. Nothing
- B. They would decrease or move away
- C. They would increase
- D. They would eat algae
7
Question 7
Food webs: which statement is NOT true?
- A. Plants do not compete with each other.
- B. Animals often compete for food, water and space.
- C. Plants compete for light, water and minerals.
- D. Predator and prey populations often rise and fall in cycles.
8
Question 8
What does "interdependence" mean in an ecosystem?
- A. Every animal lives alone
- B. Only predators matter
- C. Living things depend on each other, so a change to one affects others
- D. Plants do not need animals at all
9
Question 9
Woodland food web: grass is eaten by rabbits and mice. Seeds are eaten by mice. Rabbits are eaten by foxes. Mice are eaten by foxes and owls. Which animal is eaten by two different predators?
- A. foxes
- B. mice
- C. rabbits
- D. owls
10
Question 10
Food webs: which statement is NOT true?
- A. Predator and prey populations often rise and fall in cycles.
- B. Removing a predator always helps every other species.
- C. Removing one species can affect many others in a food web.
- D. Animals often compete for food, water and space.
11
Question 11
What does "interdependence" mean in an ecosystem?
- A. Plants do not need animals at all
- B. Living things depend on each other, so a change to one affects others
- C. Every animal lives alone
- D. Only predators matter
12
Question 12
Pond food web: algae are eaten by tadpoles and water fleas. Tadpoles and water fleas are eaten by small fish. Small fish are eaten by herons. If all the small fish died, what would probably happen to the tadpoles at first?
- A. They would increase
- B. They would turn into fish
- C. They would decrease
- D. They would stay exactly the same
13
Question 13
Food webs: which statement is NOT true?
- A. A food web contains only one food chain.
- B. Predator and prey populations often rise and fall in cycles.
- C. Animals often compete for food, water and space.
- D. Plants compete for light, water and minerals.
14
Question 14
What does "interdependence" mean in an ecosystem?
- A. Every animal lives alone
- B. Plants do not need animals at all
- C. Living things depend on each other, so a change to one affects others
- D. Only predators matter
15
Question 15
Woodland food web: grass is eaten by rabbits and mice. Seeds are eaten by mice. Rabbits are eaten by foxes. Mice are eaten by foxes and owls. Which animal is eaten by two different predators?
- A. foxes
- B. owls
- C. rabbits
- D. mice
16
Question 16
Food webs: which statement is NOT true?
- A. Plants do not compete with each other.
- B. Predator and prey populations often rise and fall in cycles.
- C. Animals often compete for food, water and space.
- D. Removing one species can affect many others in a food web.

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Answer key: Food webs and interdependence

1. D. A food web contains only one food chain.
2. B. Living things depend on each other, so a change to one affects others
3. D. Their numbers fall, because foxes eat more mice
4. A. Plants do not compete with each other.
5. C. Most animals eat, and are eaten by, more than one kind of living thing
6. B. They would decrease or move away
7. A. Plants do not compete with each other.
8. C. Living things depend on each other, so a change to one affects others
9. B. mice
10. B. Removing a predator always helps every other species.
11. B. Living things depend on each other, so a change to one affects others
12. A. They would increase
13. A. A food web contains only one food chain.
14. C. Living things depend on each other, so a change to one affects others
15. D. mice
16. A. Plants do not compete with each other.