3.10 To measure accurately

Natural sciences

Matter, measuring and reactions

Educator section

Memorandum

With the first reading an error of parallax is made. Sketch (b) is therefore accurate. Accept learner's wording, e.g. the scale has to be close to the place of measurement, etc.

Leaner section

Content

Activity: to measure accurately [lo 1.2]

• Which of the following illustrations shows a correct measuring technique?

Explain:

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When your eye is not in line with the scale divisions of a measuring instrument, an error of parallax occurs.

Assessment

Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: organises and uses apparatus/equipment or sources to gain and record information.