Understanding Physics Measurements

What is the SI unit of length?

• millimeter

• meter

• centimeter

• kilometer

Which instrument is used to measure mass?

• Voltmeter

• Thermometer

• Barometer

• Balance or scale

What does a thermometer measure?

• Altitude

• Humidity

• Pressure

• Temperature

What is the purpose of a ruler in measurements?

• To measure temperature accurately.

• To calculate the area of a shape.

• To draw straight lines only.

• The purpose of a ruler in measurements is to provide accurate length and distance measurements.

Which of the following is a derived unit?

• Newton (N)

• Joule (J)

• Coulomb (C)

• Pascal (Pa)

What is the standard unit of time in the SI system?

• minute

• hour

• day

• second

How do you convert Celsius to Kelvin?

• K = °C - 273.15

• K = °C + 273.15

• K = °C + 100

• K = °C * 1.8

What is the significance of precision in measurements?

• Precision is irrelevant when using digital measuring tools.

• Precision has no impact on the overall quality of measurements.

• Precision is only important in scientific experiments.

• Precision is significant as it enhances the reliability and accuracy of measurements.

Which tool would you use to measure the volume of a liquid?

• Beaker

• Ruler

• Thermometer

• Graduated cylinder

What is the difference between accuracy and precision?

• Accuracy measures the average; precision measures the maximum.

• Accuracy is subjective; precision is objective.

• Accuracy is about correctness; precision is about consistency.

• Accuracy is about the number of attempts; precision is about the time taken.