Calculate the total uptake of carbon dioxide between 11.40 and 13.15 hours in trees exposed to full sun in a forest that is 12 000 m² in area - AQA - A-Level Biology - Question 5 - 2022 - Paper 3

To calculate the total uptake of carbon dioxide, we first need to find the rate of uptake during the specified time interval (11.40 to 13.15 hours) from the results shown in Figure 8. Assuming the uptake rate during this interval is measured in micromoles per square meter per hour (μmol m⁻² h⁻¹) and let's say the average uptake is 'X' μmol m⁻² h⁻¹:

1. Determine the time interval in hours:

   • From 11.40 to 13.15 is 1 hour and 35 minutes.
   • Convert this into hours: 1 + 35/60 = 1.5833 hours.

2. Calculate the total area:

   • Total area = 12,000 m².

3. Calculate total uptake:

   • Total uptake = Average uptake rate × Area × Time interval
   • Total uptake = X × 12,000 × 1.5833 in μmol.

4. Convert to standard form if necessary. The results will be reported in μmol.