Reading a Results Table (Grade 8)
Free printable Grade 8 science inquiry worksheet on processing data. Students calculate means from a results table, find the range, spot the anomaly and describe the trend.
Grade 8 · Science worksheet
Name
Date
Science
Reading a Results Table: Light and Plant Growth
The table shows the height of bean plants after three weeks under four different daily light times. Three plants were grown at each light time. Work out the means, ignoring any anomalous result, then answer the questions.
| Light per day (hours) | Trial 1 (mm) | Trial 2 (mm) | Trial 3 (mm) |
|---|---|---|---|
| 4 | 118 | 122 | 120 |
| 8 | 176 | 182 | 179 |
| 12 | 214 | 208 | 211 |
| 16 | 230 | 226 | 300 |
- 1.Calculate the mean plant height at 4 hours of light per day.
- 2.Calculate the mean plant height at 8 hours of light per day.
- 3.Calculate the mean plant height at 12 hours of light per day.
- 4.Calculate the mean plant height at 16 hours of light per day.
- 5.One result does not fit the pattern. Which result is the anomaly, and what should be done with it?
- 6.Calculate the range of the three results at 4 hours of light per day.
- 7.Describe the trend shown by the mean results.
- 8.What is the independent variable in this investigation?
- 9.If you drew a line graph of this data, which variable belongs on the horizontal (x) axis?
- 10.Ethan concludes that more hours of light each day give taller plants. Do these results support his conclusion, and why?
- 11.Why is a mean of three trials more useful than a single measurement?
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