Question 12
Ahmad investigates the respiration rate of 35 grams of bean sprouts using a respirometer with coloured liquid. The table shows his observations.
Figure labels: coloured liquid; RESPIROMETER.
| No. | Observation time (minutes) | Displacement of coloured liquid (ml) | Mean respiration rate (ml/minute) |
|---|---|---|---|
| 0 | 0 | 0 | |
| 1 | 5 | 1.5 | |
| 2 | 10 | 3 | 1.5 ml/5 minutes |
| 3 | 15 | 4.5 | |
| 4 | 20 | 6 | |
A. Predict the displacement of coloured liquid at the 25th minute. (1 point)
a) 6.5
b) 7
c) 7.5
d) 8
e) 8.5
B. Using the data above, draw a line graph of displacement against time. (2 points)
Figure labels: coloured liquid; RESPIROMETER.
| No. | Observation time (minutes) | Displacement of coloured liquid (ml) | Mean respiration rate (ml/minute) |
|---|---|---|---|
| 0 | 0 | 0 | |
| 1 | 5 | 1.5 | |
| 2 | 10 | 3 | 1.5 ml/5 minutes |
| 3 | 15 | 4.5 | |
| 4 | 20 | 6 | |
A. Predict the displacement of coloured liquid at the 25th minute. (1 point)
a) 6.5
b) 7
c) 7.5
d) 8
e) 8.5
B. Using the data above, draw a line graph of displacement against time. (2 points)