What are the seven base units of the SI system?

What are the seven base units of the SI system?

• A. Area, volume, mass, temperature, amount, electric current, time.
• B. Meter (m), gram, second, Celsius, mole, ampere, candela.
• C. Meter (m), kilogram (kg), second (s), Kelvin (K), mole (mol), ampere (A), and candela (cd).
• D. Foot, pound, second, kelvin, mole, ampere, candela.

Answer: (C)

The fundamental idea being tested is identifying the seven base quantities that define the SI system and their base units. In SI, length is measured with the meter, mass with the kilogram, time with the second, thermodynamic temperature with the kelvin, amount of substance with the mole, electric current with the ampere, and luminous intensity with the candela. These seven base units form the foundation from which all other SI units are derived, and they are expressed with the standard symbols m, kg, s, K, mol, A, and cd. That’s why this set is the best answer: it lists exactly the base units and their corresponding quantities. The other options mix in derived quantities like area and volume, or use units that are not base SI units (such as Celsius for temperature, gram for mass instead of kilogram, or non-SI units like feet and pounds).

The fundamental idea being tested is identifying the seven base quantities that define the SI system and their base units. In SI, length is measured with the meter, mass with the kilogram, time with the second, thermodynamic temperature with the kelvin, amount of substance with the mole, electric current with the ampere, and luminous intensity with the candela. These seven base units form the foundation from which all other SI units are derived, and they are expressed with the standard symbols m, kg, s, K, mol, A, and cd.

That’s why this set is the best answer: it lists exactly the base units and their corresponding quantities. The other options mix in derived quantities like area and volume, or use units that are not base SI units (such as Celsius for temperature, gram for mass instead of kilogram, or non-SI units like feet and pounds).