Which SI base unit is used by scientists to measure the mass of an object?

• A. liter
• B. kilogram
• C. meter
• D. gram

Answer: (B)

Verified step by step guidance

1. Understand that the International System of Units (SI) defines base units for fundamental physical quantities such as length, mass, and time.
2. Recall that the SI base unit for length is the meter (m), which measures distance.
3. Recognize that the liter (L) is a unit of volume, not a base SI unit, and is commonly used to measure liquids.
4. Know that the gram (g) is a unit of mass but is not the SI base unit; it is derived from the kilogram.
5. Identify that the kilogram (kg) is the SI base unit for mass, and it is the standard unit scientists use to measure the mass of an object.