Isabel wants to determine the mass of a metal block. What is the SI unit for mass?

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

Answer: (B)

Verified step by step guidance

1. Understand that the problem is asking for the SI unit of mass, which is the standard unit used internationally in science and engineering.
2. Recall that the SI (International System of Units) base unit for mass is the kilogram, symbolized as kg.
3. Note that other options like liter and meter are units for volume and length, respectively, and gram is a unit of mass but not the SI base unit.
4. Recognize that while gram is commonly used, the kilogram is the official SI base unit for mass.
5. Conclude that the correct SI unit for mass is the kilogram.