Measurement
Introduction to measurement
What you can measure: length, mass, capacity, time, temperature.
Measurement assigns numbers to physical quantities — length, mass, time, temperature.
Quick check
Which of these is a unit of mass?
Measurement is just counting in standard chunks — how many metres long, how many kilograms heavy, how many seconds it took.
Your turn
Name the quantity each unit measures: km, °C, mL, hr.
Recap
- Measurement assigns a number + a unit to a physical quantity.
- Core quantities: length, mass, capacity, time, temperature.
- The number alone is meaningless — '5' could be 5 mm or 5 km.
Quantities you can measure
- Length — m, cm, ft.
- Mass — kg, g, lb.
- Capacity — L, mL, gal.
- Time — s, min, hr.
- Temperature — °C, °F, K.