Understanding SI Units and Measurements

What is the SI unit for mass?

• pound

• gram

• kilogram

• ounce

Define measurement uncertainty.

• Measurement uncertainty is the doubt about the result of a measurement, expressed as a range of values.

• Measurement uncertainty is the exact value of a measurement.

• Measurement uncertainty is the total error in a measurement without any range.

• Measurement uncertainty refers to the precision of a measurement tool.

How do you convert 5 kilometers to meters?

• 500 meters

• 5,000 kilometers

• 5000 meters

• 50 kilometers

What is dimensional analysis used for?

• To predict weather patterns

• To analyze financial data

• To measure temperature changes

• To convert units, check equation consistency, and derive relationships between quantities.

How many significant figures are in the number 0.00456?

• 3

• 4

• 5

• 2

What are the two main types of measurements?

• Descriptive and Analytical

• Static and Dynamic

• Qualitative and Quantitative

• Primary and Secondary

What is the SI unit for temperature?

• Celsius

• Kelvin

• Rankine

• Fahrenheit

Explain the concept of systematic error.

• Systematic error is a consistent, repeatable error that skews measurements in a specific direction.

• Systematic error is a type of error that cannot be corrected or identified.

• Systematic error is a random error that varies with each measurement.

• Systematic error is an error that only occurs in digital measurements.

Convert 2500 milliliters to liters.

• 2.5 liters

• 1.5 liters

• 250 liters

• 3 liters

What is the significance of significant figures in calculations?

• Significant figures are important for accurately representing the precision of measurements in calculations.

• Significant figures are only relevant in scientific research.

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

• Significant figures are used to round up all numbers in calculations.