IB MYP Integrated Sciences e-Assessment : pH scale and indicators
Exam Style Practice Questions - New Syllabus
Question (4 marks)
A student is investigating the growth of bean sprouts. The student collected data for 3 plants over 7 days. The data for the first 2 plants is given in the table below. Measure the height of the third plant for days 5, 6 and 7 and record your values in the table. You should measure the height, from the top of the soil to the highest point of the plant.
Calculate the missing mean values to complete the table. Show your working in the box below and add your final values to the table.A
▶️Answer/Explanation
Ans:
Day 5: 3.2 cm
Day 6: 6.1 cm
Day 7: 8.4 cm
Day 5
Values: \( 4.4, 2.8, 3.2 \)
$
\text{Average} = \frac{4.4 + 2.8 + 3.2}{3} = \frac{10.4}{3} \approx 3.47
$
Day 6
Values: \( 6.8, 5.1, 6.1 \)
$
\text{Average} = \frac{6.8 + 5.1 + 6.1}{3} = \frac{18.0}{3} = 6.0
$
Day 7
Values: \( 8.1, 8.3, 8.4 \)
$
\text{Average} = \frac{8.1 + 8.3 + 8.4}{3} = \frac{24.8}{3} \approx 8.27
$
