tion/z_3B2_3D_files/Science worksheet MS x 23/Unit/Unit_1/Activity_sheets/SCI07SHAS07105.3d] [18/10/011
Graphing in science
In science, graphs are used to visually display data gained through experimentation. There are a number of
different types of graphs, and it is important that you choose the right one to display your data.
Although software is available for creating graphs, drawing your own graphs is a useful skill to develop.
A line graph is used to display data that is continuous. That is, each point is related to the one before and the
one after. Examples of continuous data are length, weight and temperature. For example, suppose that you
measured the temperature in a beaker of water while it is being heated over a Bunsen burner for a period of
10 minutes. The data you collected is shown in the following table.
Time (min) Temperature (˚C)
When drawing a line graph, you need to use the following steps.
1 Draw two axes at right angles to each other.
2 Make sure the axes are long enough to show all of the information, with an arrow on the end of each.
3 Mark each axis with a suitable scale; for example, 1 cm ¼ 10˚C.
4 Name each axis to show what it repr esents.
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