SI Units & Prefixes Flashcards

6 cards from real CMS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 SI Units & Prefixes flashcards as text

The prefix 'centi-' equals which power of ten?
Answer: 10⁻²
Centi- means 10⁻², so one centimeter is one-hundredth of a meter.
Which SI unit measures the amount of substance?
Answer: Mole
The mole (mol) is the SI base unit for amount of substance, defined relative to Avogadro's number.
What does the SI prefix 'mega-' represent?
Answer: 10⁶
Mega- represents 10⁶, meaning one million, as in megabytes or megahertz.
The pascal (Pa) is the SI derived unit for:
Answer: Pressure
The pascal measures pressure, defined as one newton per square meter (N/m²).
Which SI prefix is abbreviated with a lowercase 'u' in ASCII contexts?
Answer: Micro
Micro (µ) is represented as 'u' in ASCII because the Greek letter µ is unavailable on some systems.
The SI unit of frequency is the hertz (Hz), which equals:
Answer: Cycles per second
One hertz equals one cycle per second, named after physicist Heinrich Hertz.