Reading a Results Table (Grade 7)
Free printable Grade 7 science inquiry worksheet on processing data. Students calculate means from a results table, find the range, spot the anomaly and describe the trend.
Grade 7 · Science worksheet
Name
Date
Science
Reading a Results Table: Dissolving Sugar
The table shows how long a sugar cube took to dissolve in 100 mL of water at four temperatures. Each test was repeated three times. Work out the means, ignoring any anomalous result, then answer the questions.
| Water temperature (degrees Celsius) | Trial 1 (s) | Trial 2 (s) | Trial 3 (s) |
|---|---|---|---|
| 20 | 90 | 94 | 92 |
| 40 | 62 | 58 | 60 |
| 60 | 44 | 40 | 84 |
| 80 | 30 | 26 | 28 |
- 1.Calculate the mean dissolving time at 20 degrees Celsius.
- 2.Calculate the mean dissolving time at 40 degrees Celsius.
- 3.Calculate the mean dissolving time at 60 degrees Celsius.
- 4.Calculate the mean dissolving time at 80 degrees Celsius.
- 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 20 degrees Celsius.
- 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.Mia concludes that sugar dissolves faster in hotter water. Do these results support her conclusion, and why?
- 11.Why is a mean of three trials more useful than a single measurement?
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