Chemistry·Scientific processes · NSSCO 1.3
Basic units & derived units
Narrated lesson · press play
Every measurement needs the right unit, written the right way. Learn SI and derived units, how length links to area and volume, the full ladder of metric prefixes from tera to pico, standard form, how to state units and significant figures, plus absolute zero and the Kelvin scale.
What you'll learn in this lesson
By the end you should be able to (NSSCO Chemistry 1.3):
- Explain and use the relationships between length, surface area and volume and their units on metric scales
- Identify the correct SI unit and derived units, and use the metric prefixes (tera, giga, mega, kilo, deci, centi, milli, micro, nano, pico) to convert between quantities
- Use standard (scientific) notation
- Use acceptable methods of stating units (e.g. m/s or m s⁻¹; the solidus for a quotient and for table/graph labels)
- Use the appropriate number of significant figures
- State the concept of absolute zero and the Kelvin scale, and convert using T/°C + 273.15 = T/K
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