Questena practice
SI Units
How the base units are defined since the 2019 redefinition, and how unit symbols must be written.
Your next session
Start sessionNext session · 20 questions
About 9 min
Session mix
- Mistakes · 0
- Weak topics · 0
- New · 20
- Review · 0
Scored practice set
Complete a fixed vocabulary or subject practice set with answers shown at the end. It is not an exam simulation.
Questions: 20 · editorial practice threshold: 14
Topics
3 sections · 20 questions- How the base units are defined8 q
- Writing units and symbols7 q
- Prefixes and multiples5 q