Living and non-living factors in an ecosystem

Question 1

Is this a biotic or an abiotic factor: amount of water?

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

Question 2

Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 10 % → 3 30 % → 5 50 % → 7 70 % → 9 90 % → 11 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 tree eats the daisies.
• D. The data prove that light is the only factor that matters.

Question 3

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

Question 4

Is this a biotic or an abiotic factor: number of pollinating insects?

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

Question 5

Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 90 % → 13 70 % → 10 50 % → 7 30 % → 4 10 % → 1 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. The tree eats the daisies.
• D. More daisies grow where light intensity is higher.

Question 6

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

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

Question 7

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

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

Question 8

Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 10 % → 3 30 % → 8 50 % → 13 70 % → 18 90 % → 23 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.

Question 9

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

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

Question 10

Is this a biotic or an abiotic factor: a new predator?

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

Question 11

Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 90 % → 23 70 % → 18 50 % → 13 30 % → 8 10 % → 3 Which conclusion do the data support?

• A. Light has no link with the number of daisies.
• B. The tree eats the daisies.
• C. Daisies grow best in the shade.
• D. More daisies grow where light intensity is higher.

Question 12

Warmer ocean water causes corals to lose the algae living inside them (bleaching). Which factor changed?

• A. temperature, an abiotic factor
• B. the number of fish
• C. light, which disappeared
• D. predators, a biotic factor

Question 13

Is this a biotic or an abiotic factor: amount of water?

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

Question 14

Students placed quadrats in a line leading out from under a tree. Light intensity (% of full sunlight) → number of daisies: 10 % → 1 30 % → 4 50 % → 7 70 % → 10 90 % → 13 Which conclusion do the data support?

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

Question 15

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

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

Question 16

Is this a biotic or an abiotic factor: competition for food?

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