Fundamentals of Measurement

What is the basic unit of length in the metric system?

• centimeter

• millimeter

• meter

• kilometer

Define precision in the context of measurement.

• Precision is the difference between the highest and lowest measurements.

• Precision refers to the accuracy of a single measurement.

• Precision is the average of all measurements.

• Precision is the consistency of repeated measurements.

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

• Graduated cylinder

• Ruler

• Beaker

• Thermometer

Explain the difference between accuracy and precision.

• Accuracy measures the average; precision measures the range.

• Accuracy is about the number of trials; precision is about the outcome.

• Accuracy is about correctness; precision is about consistency.

• Accuracy is subjective; precision is objective.

What is the unit of mass in the International System of Units (SI)?

• gram

• pound

• ounce

• kilogram

Which instrument is commonly used to measure temperature?

• barometer

• thermometer

• anemometer

• hygrometer

How does a ruler measure length accurately?

• A ruler measures length by aligning the object with the zero mark and reading the measurement at the other end.

• A ruler measures length by estimating the distance with a visual approximation.

• A ruler measures length by using a digital display to show the measurement.

• A ruler measures length by folding it in half and measuring the object twice.

What is the significance of significant figures in measurement?

• Significant figures are used to round numbers to the nearest whole number.

• Significant figures have no impact on the reliability of measurements.

• Significant figures are only important in scientific research.

• Significant figures are crucial for conveying the precision and accuracy of measurements.

Name a tool used for measuring electrical current.

• ammeter

• voltmeter

• ohmmeter

• wattmeter

What is the role of calibration in measurement tools?

• Calibration is used to increase the size of measurement tools.

• Calibration is irrelevant to the accuracy of measurements.

• Calibration is essential for ensuring accuracy and reliability in measurement tools.

• Calibration is only necessary for digital tools.