Measurement Puzzles
1. Match the SI Units
Match the following physical quantities with their correct SI units:
- Length → (a) kelvin, (b) metre, (c) kilogram
- Mass → (a) second, (b) metre, (c) kilogram
- Time → (a) second, (b) kelvin, (c) ampere
Think about basic quantities like weight and distance.
- Length → metre
- Mass → kilogram
- Time → second
2. Fill in the Blank
The SI unit of electric current is ______.
It starts with 'A'.
ampere
3. Identify the Instrument
Which instrument is used to measure the diameter of a small sphere?
It is more precise than a ruler.
Vernier Caliper
4. Error Classification
What type of error is caused by faulty calibration of an instrument?
Think of a predictable error that occurs consistently.
Systematic Error
5. Significant Figures
How many significant figures are in 0.00456?
Ignore the leading zeros.
3 Significant Figures
6. Spot the Error
If 4.0 m × 2.0 m = 8.00 m², what is wrong with the significant figures?
The result should have the least number of significant figures.
The result should be 8.0 m².
7. Conversion Puzzle
Convert 5 kilometers to meters.
1 kilometer = 1000 meters.
5000 meters
8. Multiple Choice
Which of the following is not an SI base unit?
(a) kelvin
(b) gram
(c) second
(d) ampere
It’s related to mass but not the standard unit.
gram
9. True or False
The SI unit of luminous intensity is candela. True or False?
It starts with 'C'.
True
10. Instrument Reading
If the vernier scale reading is 0.03 mm and the main scale reading is 10 mm, what is the total measurement?
Add the main scale and vernier scale readings.
10.03 mm
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