Tables, units and significant figures
A results table must preserve raw evidence and present calculated quantities with consistent precision.
Headings contain quantity and unit; raw readings preserve instrument precision and calculated values use justified significant figures.
By the end of this lesson, you can:
- construct a single results table;
- write valid quantity and unit headings;
- record raw and calculated values;
- use appropriate significant figures.
Table structure
Place all raw and calculated data in one table. Put the independent variable first and include repeated readings where they are taken.
Column headings
Write quantity symbol divided by unit, such as l / m or V / V. Units belong in headings, not beside every data value.
Precision
Raw readings should reflect instrument resolution. Calculated values usually have the same significant-figure precision as the least precise input. Keep decimal places consistent within a column.
WORKED EXAMPLEReveal method
If time readings are 12.4 s, 13.0 s and 13.6 s, do not write one entry as 13 s.
Try another worked problem
Attempt the question yourself, then reveal the examiner-style solution when you are ready.
Table heading
Write a correct heading for squared period.
CHECK YOUR ANSWERReveal solution
T² / s², with the quantity symbol separated from its unit.
Mastery check
Which is a valid table heading for current measured in amperes?