Q1
What is the SI unit of length?
AMetre
BKilogram
CSecond
DLitre
ICSEClass 9 (ICSE)PhysicsCh 1 · Topic 2
Practice and Revision - Measurements and Experimentation
Let us practise and revise what we learned about measurements and experimentation. Accurate measurements using standard units and proper exp
Core concept
The SI system uses base units like metre (length), kilogram (mass), and second (time), ensuring consistency in scientific measurement worldwide.
How it works
Precision instruments, like Vernier callipers (accurate to 0.01cm) and screw gauges (accurate to 0.001cm), measure small lengths more precisely than rulers.
Why it matters
Systematic errors (consistent, repeatable errors) and random errors (unpredictable variations) both affect measurement accuracy and must be minimised.
Key detail
Proper experimental technique, including repeated measurements and careful observation, ensures reliable, accurate scientific results.
Exam highlight
Key diagram
Keywords worth remembering
Trending
measurements and experimentationicse class 9
Most searched
ICSE class 9 measurements and experimentation
Quick revision
Study resources
Notes & downloads
Quick notes
• SI units: metre, kilogram, second.
• Vernier callipers measure to 0.01cm accuracy.
• Screw gauges measure to 0.001cm accuracy.
• These are more precise than standard rulers.
• Systematic errors are consistent, repeatable.
• Random errors are unpredictable variations.
• Both affect measurement accuracy.
• Proper technique ensures reliable results.