ExpertEasy1 markMultiple Choice
AQA GCSE · Question 03.2 · Bioenergetics
Which range of carbon dioxide concentrations caused the rate of photosynthesis to change the most?
Which range of carbon dioxide concentrations caused the rate of photosynthesis to change the most?
Answer options:
A.
From 0.00% to 0.02%
B.
From 0.02% to 0.04%
C.
From 0.04% to 0.06%
D.
From 0.06% to 0.08%
How to approach this question
For each option, calculate the difference in the "Rate of photosynthesis" from the table.
1. **0.00% to 0.02%:** Change = 5 - 0 = 5
2. **0.02% to 0.04%:** Change = 16 - 5 = 11
3. **0.04% to 0.06%:** Change = 19 - 16 = 3
4. **0.06% to 0.08%:** Change = 20 - 19 = 1
Compare these changes to find the largest one.
Full Answer
B.From 0.02% to 0.04%✓ Correct
To find the range with the greatest change, we need to calculate the difference in the rate of photosynthesis for each interval:
- **From 0.00% to 0.02%:** The rate changes from 0 to 5. The change is 5 - 0 = 5 units.
- **From 0.02% to 0.04%:** The rate changes from 5 to 16. The change is 16 - 5 = 11 units.
- **From 0.04% to 0.06%:** The rate changes from 16 to 19. The change is 19 - 16 = 3 units.
- **From 0.06% to 0.08%:** The rate changes from 19 to 20. The change is 20 - 19 = 1 unit.
The largest change is 11 units, which occurred in the range from 0.02% to 0.04% carbon dioxide concentration.
Common mistakes
✗ Making a calculation error.\n✗ Just looking at the highest rate (20) instead of the biggest change between two points.
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