Physical Quantities and Measurement
ICSE · Class 6 · Physics
Complete topic list for Physical Quantities and Measurement in ICSE Class 6 Physics. Key concepts, sub-topics, and what to focus on for board exams.
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1. What is Measurement?
- Measurement is the process of comparing an unknown quantity with a known standard unit.
- Every measurement has two parts: a number (n) and a unit (u). For example, 5 m means 5 times the unit 'metre'.
- Our senses like touch or sight are not reliable for exact measurement. We use instruments for accuracy.
2. Measurement of Length
- Length is the distance between two points.
- S.I. unit of length is metre (m).
- Common units: centimetre (cm), millimetre (mm), kilometre (km).
3. Measurement of Mass
- Mass is the amount of matter in an object.
- S.I. unit of mass is kilogram (kg).
- Smaller units: gram (g), milligram (mg). Larger units: quintal, metric tonne.
4. Measurement of Time
- Time is the interval between two events.
- S.I. unit of time is second (s).
- Larger units: minute (min), hour (h), day, year.
Key Concepts
Central concept: Measurement
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