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9th grade ecosystems and food chains

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-LS2-5, NGSS.MS-LS2-3 · England: KS3 Chemistry: Earth and atmosphere, KS4 Combined Science: Ecosystems

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1
Question 1
Does this process remove carbon dioxide from the air or add it: burning forests?
- A. removes CO₂ from the air
- B. adds CO₂ to the air
2
Question 2
Why has the carbon dioxide level in the air increased since the 1800s?
- A. More photosynthesis
- B. The Sun has become colder
- C. Burning fossil fuels and cutting down forests
- D. Fewer volcanoes
3
Question 3
Which process adds carbon dioxide to the air?
- A. trees growing
- B. carbon dioxide dissolving in the sea
- C. algae growing in the ocean
- D. burning fossil fuels
4
Question 4
Does this process remove carbon dioxide from the air or add it: burning fossil fuels?
- A. removes CO₂ from the air
- B. adds CO₂ to the air
5
Question 5
How did fossil fuels such as coal form?
- A. from the remains of ancient plants buried and compressed over millions of years
- B. from melted rock
- C. from seawater evaporating
- D. from volcanoes erupting last century
6
Question 6
Which process removes carbon dioxide from the air?
- A. respiration
- B. decomposition by microorganisms
- C. volcanic eruptions
- D. photosynthesis
7
Question 7
Does this process remove carbon dioxide from the air or add it: decomposition by microorganisms?
- A. removes CO₂ from the air
- B. adds CO₂ to the air
8
Question 8
What role do microorganisms play in the carbon cycle?
- A. They photosynthesise in the dark
- B. They have no role
- C. They decompose dead organisms, releasing carbon dioxide by respiration
- D. They turn carbon into oxygen
9
Question 9
Which process adds carbon dioxide to the air?
- A. carbon dioxide dissolving in the sea
- B. burning forests
- C. trees growing
- D. algae growing in the ocean
10
Question 10
Does this process remove carbon dioxide from the air or add it: burning forests?
- A. removes CO₂ from the air
- B. adds CO₂ to the air
11
Question 11
Why has the carbon dioxide level in the air increased since the 1800s?
- A. Fewer volcanoes
- B. Burning fossil fuels and cutting down forests
- C. More photosynthesis
- D. The Sun has become colder
12
Question 12
Which process removes carbon dioxide from the air?
- A. burning forests
- B. respiration
- C. burning fossil fuels
- D. trees growing
13
Question 13
Does this process remove carbon dioxide from the air or add it: carbon dioxide dissolving in the sea?
- A. removes CO₂ from the air
- B. adds CO₂ to the air
14
Question 14
Why has the carbon dioxide level in the air increased since the 1800s?
- A. The Sun has become colder
- B. Fewer volcanoes
- C. More photosynthesis
- D. Burning fossil fuels and cutting down forests
15
Question 15
Which process removes carbon dioxide from the air?
- A. volcanic eruptions
- B. trees growing
- C. decomposition by microorganisms
- D. respiration
16
Question 16
Does this process remove carbon dioxide from the air or add it: carbon dioxide dissolving in the sea?
- A. removes CO₂ from the air
- B. adds CO₂ to the air

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Answer key: 9th grade ecosystems and food chains

1. B. adds CO₂ to the air
2. C. Burning fossil fuels and cutting down forests
3. D. burning fossil fuels
4. B. adds CO₂ to the air
5. A. from the remains of ancient plants buried and compressed over millions of years
6. D. photosynthesis
7. B. adds CO₂ to the air
8. C. They decompose dead organisms, releasing carbon dioxide by respiration
9. B. burning forests
10. B. adds CO₂ to the air
11. B. Burning fossil fuels and cutting down forests
12. D. trees growing
13. A. removes CO₂ from the air
14. D. Burning fossil fuels and cutting down forests
15. B. trees growing
16. A. removes CO₂ from the air