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6th grade ecosystems and food chains

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

Name

Date

Score/ 16

  1. Question 1

    Grey squirrels were introduced to Britain and red squirrel numbers fell. What kind of factor are the grey squirrels for the red squirrels?

    • A. abiotic: temperature
    • B. abiotic: soil pH
    • C. biotic: competition and disease
    • D. not a factor at all

  2. Question 2

    Food webs: which statement is NOT true?

    • A. Plants compete for light, water and minerals.
    • B. Plants do not compete with each other.
    • C. Removing one species can affect many others in a food web.
    • D. Animals often compete for food, water and space.

  3. Question 3

    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. They would increase
    • B. They would eat algae
    • C. Nothing
    • D. They would decrease or move away

  4. Question 4

    Is this a biotic or an abiotic factor: a disease?

    • A. abiotic (non-living)
    • B. biotic (living)

  5. Question 5

    Why is a food web more realistic than a single food chain?

    • A. Food webs only show plants
    • B. Animals only ever eat one food
    • C. Food webs have no producers
    • D. Most animals eat, and are eaten by, more than one kind of living thing

  6. Question 6

    Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 90 % → 14 70 % → 11 50 % → 8 30 % → 5 10 % → 2 Which conclusion do the data support?

    • A. Light has no link with the number of daisies.
    • B. More daisies grow where light intensity is higher.
    • C. The data prove that light is the only factor that matters.
    • D. Daisies grow best in the shade.

  7. Question 7

    Grey squirrels were introduced to Britain and red squirrel numbers fell. What kind of factor are the grey squirrels for the red squirrels?

    • A. abiotic: temperature
    • B. abiotic: soil pH
    • C. biotic: competition and disease
    • D. not a factor at all

  8. Question 8

    Food webs: which statement is NOT true?

    • A. Removing a predator always helps every other species.
    • 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.

  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. owls
    • B. mice
    • C. rabbits
    • D. foxes

  10. Question 10

    Is this a biotic or an abiotic factor: carbon dioxide level?

    • A. abiotic (non-living)
    • B. biotic (living)

  11. Question 11

    Why is a food web more realistic than a single food chain?

    • A. Food webs only show plants
    • B. Food webs have no producers
    • C. Most animals eat, and are eaten by, more than one kind of living thing
    • D. Animals only ever eat one food

  12. Question 12

    Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 10 % → 3 30 % → 6 50 % → 9 70 % → 12 90 % → 15 Which conclusion do the data support?

    • A. The data prove that light is the only factor that matters.
    • B. Light has no link with the number of daisies.
    • C. More daisies grow where light intensity is higher.
    • D. Daisies grow best in the shade.

  13. Question 13

    Lichens grow less well near busy roads. Which abiotic factor is the likely cause?

    • A. the number of predators
    • B. air pollution such as nitrogen dioxide
    • C. a new disease
    • D. competition with trees

  14. Question 14

    Food webs: which statement is NOT true?

    • A. Animals often compete for food, water and space.
    • B. Plants do not compete with each other.
    • C. Removing one species can affect many others in a food web.
    • D. Plants compete for light, water and minerals.

  15. Question 15

    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. They would decrease or move away
    • B. They would eat algae
    • C. Nothing
    • D. They would increase

  16. Question 16

    Is this a biotic or an abiotic factor: carbon dioxide level?

    • A. abiotic (non-living)
    • B. biotic (living)

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Answer key: 6th grade ecosystems and food chains

  1. 1. C. biotic: competition and disease

  2. 2. B. Plants do not compete with each other.

  3. 3. D. They would decrease or move away

  4. 4. B. biotic (living)

  5. 5. D. Most animals eat, and are eaten by, more than one kind of living thing

  6. 6. B. More daisies grow where light intensity is higher.

  7. 7. C. biotic: competition and disease

  8. 8. A. Removing a predator always helps every other species.

  9. 9. B. mice

  10. 10. A. abiotic (non-living)

  11. 11. C. Most animals eat, and are eaten by, more than one kind of living thing

  12. 12. C. More daisies grow where light intensity is higher.

  13. 13. B. air pollution such as nitrogen dioxide

  14. 14. B. Plants do not compete with each other.

  15. 15. A. They would decrease or move away

  16. 16. A. abiotic (non-living)