Question

which sentence uses the term mass correctly?
the mass of a rock is what makes it heavy.
the length of an object is also its mass.
i can measure the mass of the apple using a ruler.
the mass of this pencil is 13 centimeters.

Explanation:

Step1: Analyze each option

• Option 1: "The mass of this pencil is 13 centimeters." - Centimeters measure length, not mass. So this is incorrect.
• Option 2: "I can measure the mass of the apple using a ruler." - A ruler measures length, not mass. So this is incorrect.
• Option 3: "The length of an object is also its mass." - Length and mass are different physical quantities. So this is incorrect.
• Option 4: "The mass of a rock is what makes it heavy." - Mass is a measure of the amount of matter in an object, and more mass generally means an object is heavier (in a gravitational field). This is correct.

Answer:

The mass of a rock is what makes it heavy.