Understanding Measurement Concepts

What is the SI unit for mass?

• gram

• pound

• ounce

• kilogram

Define accuracy in the context of measurements.

• Accuracy is the range of values a measurement can take.

• Accuracy refers to the precision of a measurement.

• Accuracy is the consistency of repeated measurements.

• Accuracy is the degree to which a measurement reflects the true value.

What instrument would you use to measure temperature?

• thermometer

• barometer

• hygrometer

• anemometer

How many significant figures are in the number 0.00456?

• 5

• 4

• 3

• 2

Convert 5 kilometers to meters.

• 500 meters

• 5000 meters

• 5,000 kilometers

• 50 kilometers

What is the difference between precision and accuracy?

• Precision measures the overall quality; accuracy measures the average.

• Precision and accuracy are the same concept in measurements.

• Precision is about consistency; accuracy is about correctness.

• Precision is about the range of values; accuracy is about the mean value.

Which instrument is commonly used to measure length?

• Ruler

• Compass

• Thermometer

• Barometer

How many significant figures should the result of 2.5 x 3.1 have?

• 4

• 2

• 1

• 3

Convert 100 degrees Celsius to Kelvin.

• 373 K

• 373.15 K

• 100 K

• 273.15 K

What is the purpose of using significant figures in calculations?

• To indicate the precision of measurements and calculations.

• To simplify complex calculations.

• To ensure all measurements are rounded up.

• To eliminate the need for units in calculations.