To interpret a table, describe the trend with numbers from it, then state a conclusion that stays inside the range tested. Nothing in the answer should go beyond the data.
This lesson is in the SPM subjects section. It builds on observation versus explanation.
How do I read a small table step by step?
- Name the variable that was changed, and the one that was measured.
- Look for the direction: does the measured value rise, fall, or stay the same?
- Compare the size of the changes between rows.
- Mark any value that breaks the pattern.
Only then write your sentences. Reading in this order takes under a minute and stops you writing about the first number you see.
Worked example: temperature and reaction time
An original experiment: 2 g of marble chips are added to acid at four temperatures. The time for the chips to disappear completely is recorded.
| Temperature (°C) | Time for chips to disappear (s) |
|---|---|
| 20 | 120 |
| 30 | 65 |
| 40 | 35 |
| 50 | 20 |
Trend. As the temperature rises from 20 °C to 50 °C, the time taken falls from 120 s to 20 s.
Size of change. Each 10 °C rise cuts the time to a little over half: 120 to 65 is 54%, 65 to 35 is 54%, and 35 to 20 is 57%. The same pattern repeats at each step.
Conclusion. Within 20 °C to 50 °C, a higher temperature makes the reaction faster. This matches the idea that particles move faster and collide more often and with more energy.
The mistake that costs marks
A common over-claim is: “The time is directly proportional to temperature, so at 100 °C the reaction would be instant.” The table cannot support either part.
| Claim | Why it fails |
|---|---|
| Directly proportional | Time falls as temperature rises, and the ratio is not constant |
| Instant at 100 °C | No data above 50 °C, so this is outside the range tested |
The fix is to use words that match the data: “decreases as temperature increases” and “within the range tested”. If asked to predict, say what the pattern suggests and note the uncertainty.
A three-sentence pattern
- Trend with numbers. “As X increases from A to B, Y falls from C to D.”
- Detail. “Each step changes Y by about the same proportion” or “The largest change is between…”
- Limited conclusion. “Within this range, a higher X gives a lower Y.”
Adjust the wording to the table, but keep all three jobs.
Check yourself
A student hangs loads on a spring and measures the extension.
| Load (N) | Extension (cm) |
|---|---|
| 1 | 2.5 |
| 2 | 5.0 |
| 3 | 7.5 |
| 4 | 9.5 |
Describe the pattern, find the reading that breaks it, and suggest one reason.
Answer
For loads of 1 N, 2 N and 3 N, the extension increases by 2.5 cm for each extra newton, so it is directly proportional to load over this range (2.5 ÷ 1 = 5.0 ÷ 2 = 7.5 ÷ 3 = 2.5 cm per N).
The 4 N reading should be 10.0 cm if the pattern continued, but it is 9.5 cm, which is 0.5 cm smaller. A possible reason is that the spring has gone past its limit of proportionality. Another is a reading error, so repeating the measurement would help.
What to study next
Test the method on the original mixed practice. Use the structured answer self-review tool to check whether each sentence reports the data or claims too much.
For practice on tables from your own school experiments, see online one-to-one Additional Science tuition.