Scientific Measurement

What is the SI base unit for measuring electric current?

• Candela
• Ampere
• Kelvin
• Mole

Which statement best describes precision in measurement?

• How close a measurement is to the true value
• The degree of reproducibility between measurements
• The uncertainty in a single measurement
• The accuracy of the measuring instrument

What is the SI prefix that represents 10³ or 1000?

• Giga
• Mega
• Tera
• Kilo

Why is it important to estimate one digit beyond the smallest division on a measuring tool?

• To make the measurement look more professional
• To use the full precision of the measuring tool
• To make numbers more easily
• To avoid decimal numbers

Which SI base unit measures luminous intensity?

• Candela
• Kelvin
• Ampere
• Meter

What is the SI prefix that represents 10⁻⁹?

• Micro
• Milli
• Nano
• Deci

Why is it important to repeat measurements multiple times?

• To waste laboratory time
• To use up available materials
• To identify and reduce random errors
• To make the experiment longer

Which describes accuracy in measurement?

• The consistency of repeated measurements
• How close a measurement is to the accepted value
• The number of decimal places recorded
• The precision of the measuring tool

What is the SI base unit for temperature?

• Celsius
• Fahrenheit
• Kelvin
• Rankine

Which prefix represents 10⁻³?

• Centi
• Milli
• Micro
• Deci