At the end of this worksheet, your students should be able to: -
• Appreciate that observations can be qualitative i.e. measured,
thus we need to know how to measure accurately
• State the unit of length (mm, cm, m, km) and the SI unit as metre
• Recommend appropriate instruments for measuring each
quantity, based on their degree of accuracy [measuring tape,
ruler (0.1 cm), vernier calipers (0.01 cm)]
• Explain what is parallax error, and how it can be minimized