Name one of the seven SI base units.
Enter the English unit name, not a symbol or a measured quantity. Metre and meter both count.
SI retains seven base units. Newton and joule are derived units, while length and time are quantities rather than unit names.
Reveal all 7 checked answers and scores
Points are editorial tiers. The source supports membership in the set, not how many people know an answer.
- Meter 25 · Familiar
- Meter is in the 7-answer set defined by this question.
Also accepted: Metre
- Second 25 · Familiar
- Second is in the 7-answer set defined by this question.
- Kilogram 50 · Less common
- Kilogram is in the 7-answer set defined by this question.
- Kelvin 75 · Uncommon
- Kelvin is in the 7-answer set defined by this question.
- Ampere 75 · Uncommon
- Ampere is in the 7-answer set defined by this question.
- Mole 100 · Rare
- Mole is in the 7-answer set defined by this question.
- Candela 100 · Rare
- Candela is in the 7-answer set defined by this question.
Checked exclusions
- Newton: Newton is a derived SI unit, not a base unit.
- Joule: Joule is a derived SI unit, not a base unit.
Sources for this question
- SP 330 - Section 2 | NIST
NIST base-unit table lists seven; metre/meter spelling accepted, derived units excluded.
www.nist.gov · Checked 2026-11-02
- SI base unit - Wikipedia
NIST base-unit table lists seven; metre/meter spelling accepted, derived units excluded.
en.wikipedia.org · Checked 2026-11-02
Practice this subject
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Multiple choice offers four checked options. Recall accepts the listed labels and explicit aliases. An unlisted answer earns zero without automatically being marked factually wrong. Read the question and scoring policy.
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