Measurement and SI units — KCSE Physics
KCSE Physics · 108 practice questions · 9 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Select the most suitable measuring instrument for a given measurement and read its scale correctly
State the SI base quantities and their units (length – m, mass – kg, time – s, temperature – K, current – A)
Convert between metric prefixes (kilo, centi, milli, micro, nano) and standard SI units
Measure length using a ruler, vernier calliper and micrometer screw gauge and state the precision of each instrument
List the seven SI base quantities and their units with correct symbols
State SI units for derived quantities including speed, force, pressure, energy, power and resistance
Use metric prefixes (nano to giga) and perform unit conversions between SI units
Express numbers in standard form and to a given number of significant figures
Measurement and SI units
Sample Questions
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Define the SI unit of the following derived quantities: (a) speed (1 mark) (b) force (1 mark) (c) pressure (1 mark) (d) energy (1 mark)
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Name the seven SI base quantities along with their respective units and symbols. (7 marks)
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Identify the precision of the following measuring instruments: (a) Ruler (1 mark) (b) Vernier caliper (1 mark) (c) Micrometer screw gauge (1 mark)
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List the conversions of the following metric prefixes to their standard SI unit: (a) 5 kilo (k) (1 mark) (b) 10 milli (m) (1 mark) (c) 200 micro (μ) (1 mark) (d) 1 nano (n) (1 mark)
Why Practise Measurement and SI units?
KNEC Aligned
Questions match the KCSE syllabus objectives and exam format exactly.
Detailed Marking Schemes
Every answer shows exactly what examiners award marks for.
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