Which of the following SI units can be used to measure the mass of a grain of salt?

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

Answer: (D)

Verified step by step guidance

1. Understand that mass is a measure of the amount of matter in an object, and it is typically measured in units such as grams (g) or kilograms (kg) in the SI system.
2. Recognize that kelvin (K) is the SI unit for temperature, so it cannot be used to measure mass.
3. Know that meter (m) is the SI unit for length or distance, so it is not appropriate for measuring mass.
4. Identify that liter (L) is a unit of volume, which measures the amount of space an object occupies, not its mass.
5. Conclude that gram (g) is the correct SI unit to measure the mass of a grain of salt, as it directly quantifies the amount of matter.